diff --git a/buildSrc/src/test/java/org/springframework/boot/build/artifactory/ArtifactoryRepositoryTests.java b/buildSrc/src/test/java/org/springframework/boot/build/artifactory/ArtifactoryRepositoryTests.java
index 050dcdd349..f878e1afdf 100644
--- a/buildSrc/src/test/java/org/springframework/boot/build/artifactory/ArtifactoryRepositoryTests.java
+++ b/buildSrc/src/test/java/org/springframework/boot/build/artifactory/ArtifactoryRepositoryTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -27,7 +27,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Andy Wilkinson
  */
-public class ArtifactoryRepositoryTests {
+class ArtifactoryRepositoryTests {
 
 	@Test
 	void whenProjectVersionIsMilestoneThenRepositoryIsMilestone() {
diff --git a/buildSrc/src/test/java/org/springframework/boot/build/bom/BomPluginIntegrationTests.java b/buildSrc/src/test/java/org/springframework/boot/build/bom/BomPluginIntegrationTests.java
index 268744ee5e..0a93828427 100644
--- a/buildSrc/src/test/java/org/springframework/boot/build/bom/BomPluginIntegrationTests.java
+++ b/buildSrc/src/test/java/org/springframework/boot/build/bom/BomPluginIntegrationTests.java
@@ -38,14 +38,14 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Andy Wilkinson
  */
-public class BomPluginIntegrationTests {
+class BomPluginIntegrationTests {
 
 	private File projectDir;
 
 	private File buildFile;
 
 	@BeforeEach
-	public void setup(@TempDir File projectDir) throws IOException {
+	void setup(@TempDir File projectDir) throws IOException {
 		this.projectDir = projectDir;
 		this.buildFile = new File(this.projectDir, "build.gradle");
 	}
diff --git a/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/ArtifactVersionDependencyVersionTests.java b/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/ArtifactVersionDependencyVersionTests.java
index 643baa2219..8672866a7c 100644
--- a/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/ArtifactVersionDependencyVersionTests.java
+++ b/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/ArtifactVersionDependencyVersionTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,7 +25,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Andy Wilkinson
  */
-public class ArtifactVersionDependencyVersionTests {
+class ArtifactVersionDependencyVersionTests {
 
 	@Test
 	void parseWhenVersionIsNotAMavenVersionShouldReturnNull() {
diff --git a/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/CalendarVersionDependencyVersionTests.java b/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/CalendarVersionDependencyVersionTests.java
index ad675e3922..279016c7af 100644
--- a/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/CalendarVersionDependencyVersionTests.java
+++ b/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/CalendarVersionDependencyVersionTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,7 +25,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Andy Wilkinson
  */
-public class CalendarVersionDependencyVersionTests {
+class CalendarVersionDependencyVersionTests {
 
 	@Test
 	void parseWhenVersionIsNotACalendarVersionShouldReturnNull() {
diff --git a/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/DependencyVersionTests.java b/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/DependencyVersionTests.java
index 12fc79a866..c8852b9e08 100644
--- a/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/DependencyVersionTests.java
+++ b/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/DependencyVersionTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,7 +25,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Andy Wilkinson
  */
-public class DependencyVersionTests {
+class DependencyVersionTests {
 
 	@Test
 	void parseWhenValidMavenVersionShouldReturnArtifactVersionDependencyVersion() {
diff --git a/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/NumericQualifierDependencyVersionTests.java b/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/NumericQualifierDependencyVersionTests.java
index 5e58d3a99c..ae09f53794 100644
--- a/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/NumericQualifierDependencyVersionTests.java
+++ b/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/NumericQualifierDependencyVersionTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,7 +25,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Andy Wilkinson
  */
-public class NumericQualifierDependencyVersionTests {
+class NumericQualifierDependencyVersionTests {
 
 	@Test
 	void isNewerThanOnVersionWithNumericQualifierWhenInputHasNoQualifierShouldReturnTrue() {
diff --git a/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/ReleaseTrainDependencyVersionTests.java b/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/ReleaseTrainDependencyVersionTests.java
index a541a4e856..74556b01fe 100644
--- a/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/ReleaseTrainDependencyVersionTests.java
+++ b/buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/ReleaseTrainDependencyVersionTests.java
@@ -25,7 +25,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Andy Wilkinson
  */
-public class ReleaseTrainDependencyVersionTests {
+class ReleaseTrainDependencyVersionTests {
 
 	@Test
 	void parsingOfANonReleaseTrainVersionReturnsNull() {
diff --git a/buildSrc/src/test/java/org/springframework/boot/build/context/properties/CompoundConfigurationTableEntryTests.java b/buildSrc/src/test/java/org/springframework/boot/build/context/properties/CompoundConfigurationTableEntryTests.java
index 5e7476c30e..293ae19c9b 100644
--- a/buildSrc/src/test/java/org/springframework/boot/build/context/properties/CompoundConfigurationTableEntryTests.java
+++ b/buildSrc/src/test/java/org/springframework/boot/build/context/properties/CompoundConfigurationTableEntryTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,7 +25,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Brian Clozel
  */
-public class CompoundConfigurationTableEntryTests {
+class CompoundConfigurationTableEntryTests {
 
 	private static final String NEWLINE = System.lineSeparator();
 
diff --git a/buildSrc/src/test/java/org/springframework/boot/build/context/properties/ConfigurationTableTests.java b/buildSrc/src/test/java/org/springframework/boot/build/context/properties/ConfigurationTableTests.java
index 94f8cce26f..87e1870d9b 100644
--- a/buildSrc/src/test/java/org/springframework/boot/build/context/properties/ConfigurationTableTests.java
+++ b/buildSrc/src/test/java/org/springframework/boot/build/context/properties/ConfigurationTableTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,7 +25,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Brian Clozel
  */
-public class ConfigurationTableTests {
+class ConfigurationTableTests {
 
 	private static final String NEWLINE = System.lineSeparator();
 
diff --git a/buildSrc/src/test/java/org/springframework/boot/build/context/properties/SingleConfigurationTableEntryTests.java b/buildSrc/src/test/java/org/springframework/boot/build/context/properties/SingleConfigurationTableEntryTests.java
index c232d845e7..d77ffbb0be 100644
--- a/buildSrc/src/test/java/org/springframework/boot/build/context/properties/SingleConfigurationTableEntryTests.java
+++ b/buildSrc/src/test/java/org/springframework/boot/build/context/properties/SingleConfigurationTableEntryTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,7 +25,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Brian Clozel
  */
-public class SingleConfigurationTableEntryTests {
+class SingleConfigurationTableEntryTests {
 
 	private static final String NEWLINE = System.lineSeparator();
 
diff --git a/buildSrc/src/test/java/org/springframework/boot/build/log4j2/ReproduciblePluginsDatActionTests.java b/buildSrc/src/test/java/org/springframework/boot/build/log4j2/ReproduciblePluginsDatActionTests.java
index 0d74d79a51..1899dd7ab3 100644
--- a/buildSrc/src/test/java/org/springframework/boot/build/log4j2/ReproduciblePluginsDatActionTests.java
+++ b/buildSrc/src/test/java/org/springframework/boot/build/log4j2/ReproduciblePluginsDatActionTests.java
@@ -37,7 +37,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Andy Wilkinson
  */
-public class ReproduciblePluginsDatActionTests {
+class ReproduciblePluginsDatActionTests {
 
 	@Test
 	void postProcessingOrdersCategoriesAndPlugins() throws IOException {
diff --git a/buildSrc/src/test/java/org/springframework/boot/build/mavenplugin/PluginXmlParserTests.java b/buildSrc/src/test/java/org/springframework/boot/build/mavenplugin/PluginXmlParserTests.java
index fa0ea8d433..e5753824b9 100644
--- a/buildSrc/src/test/java/org/springframework/boot/build/mavenplugin/PluginXmlParserTests.java
+++ b/buildSrc/src/test/java/org/springframework/boot/build/mavenplugin/PluginXmlParserTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -33,7 +33,7 @@ import static org.assertj.core.api.Assertions.assertThatThrownBy;
  * @author Andy Wilkinson
  * @author Mike Smithson
  */
-public class PluginXmlParserTests {
+class PluginXmlParserTests {
 
 	private final PluginXmlParser parser = new PluginXmlParser();
 
diff --git a/buildSrc/src/test/java/org/springframework/boot/build/optional/OptionalDependenciesPluginIntegrationTests.java b/buildSrc/src/test/java/org/springframework/boot/build/optional/OptionalDependenciesPluginIntegrationTests.java
index c6bb5f64c3..fa43a615d3 100644
--- a/buildSrc/src/test/java/org/springframework/boot/build/optional/OptionalDependenciesPluginIntegrationTests.java
+++ b/buildSrc/src/test/java/org/springframework/boot/build/optional/OptionalDependenciesPluginIntegrationTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -34,14 +34,14 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Andy Wilkinson
  */
-public class OptionalDependenciesPluginIntegrationTests {
+class OptionalDependenciesPluginIntegrationTests {
 
 	private File projectDir;
 
 	private File buildFile;
 
 	@BeforeEach
-	public void setup(@TempDir File projectDir) throws IOException {
+	void setup(@TempDir File projectDir) throws IOException {
 		this.projectDir = projectDir;
 		this.buildFile = new File(this.projectDir, "build.gradle");
 	}
@@ -80,7 +80,7 @@ public class OptionalDependenciesPluginIntegrationTests {
 		optionalDependenciesAreAddedToSourceSetClasspath("test", "runtimeClasspath");
 	}
 
-	public void optionalDependenciesAreAddedToSourceSetClasspath(String sourceSet, String classpath)
+	private void optionalDependenciesAreAddedToSourceSetClasspath(String sourceSet, String classpath)
 			throws IOException {
 		try (PrintWriter out = new PrintWriter(new FileWriter(this.buildFile))) {
 			out.println("plugins {");
diff --git a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/servlet/DefaultWebMvcTagsProviderTests.java b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/servlet/DefaultWebMvcTagsProviderTests.java
index ca85f4aaec..fd5de979ee 100644
--- a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/servlet/DefaultWebMvcTagsProviderTests.java
+++ b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/servlet/DefaultWebMvcTagsProviderTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -39,7 +39,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Andy Wilkinson
  */
-public class DefaultWebMvcTagsProviderTests {
+class DefaultWebMvcTagsProviderTests {
 
 	@Test
 	void whenTagsAreProvidedThenDefaultTagsArePresent() {
diff --git a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/http/OutcomeTests.java b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/http/OutcomeTests.java
index a07d325073..c7dc98de92 100644
--- a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/http/OutcomeTests.java
+++ b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/http/OutcomeTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,7 +25,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Andy Wilkinson
  */
-public class OutcomeTests {
+class OutcomeTests {
 
 	@Test
 	void outcomeForInformationalStatusIsInformational() {
diff --git a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/web/reactive/server/DefaultWebFluxTagsProviderTests.java b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/web/reactive/server/DefaultWebFluxTagsProviderTests.java
index ffae9e16cb..ae2138346c 100644
--- a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/web/reactive/server/DefaultWebFluxTagsProviderTests.java
+++ b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/web/reactive/server/DefaultWebFluxTagsProviderTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,7 +37,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Andy Wilkinson
  */
-public class DefaultWebFluxTagsProviderTests {
+class DefaultWebFluxTagsProviderTests {
 
 	@Test
 	void whenTagsAreProvidedThenDefaultTagsArePresent() {
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/AutoConfigurationPackagesTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/AutoConfigurationPackagesTests.java
index d48346fd5d..f7a2dd9486 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/AutoConfigurationPackagesTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/AutoConfigurationPackagesTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,7 +35,7 @@ import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
  * @author Oliver Gierke
  */
 @SuppressWarnings("resource")
-public class AutoConfigurationPackagesTests {
+class AutoConfigurationPackagesTests {
 
 	@Test
 	void setAndGet() {
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/ConditionalOnMissingBeanTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/ConditionalOnMissingBeanTests.java
index 2cae40c704..c5a01cc90a 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/ConditionalOnMissingBeanTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/ConditionalOnMissingBeanTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,6 +31,7 @@ import org.springframework.beans.factory.FactoryBean;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
 import org.springframework.beans.factory.support.BeanDefinitionRegistry;
+import org.springframework.boot.autoconfigure.condition.scan.ScanBean;
 import org.springframework.boot.autoconfigure.condition.scan.ScannedFactoryBeanConfiguration;
 import org.springframework.boot.autoconfigure.condition.scan.ScannedFactoryBeanWithBeanMethodArgumentsConfiguration;
 import org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration;
@@ -60,7 +61,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Andy Wilkinson
  */
 @SuppressWarnings("resource")
-public class ConditionalOnMissingBeanTests {
+class ConditionalOnMissingBeanTests {
 
 	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner();
 
@@ -161,7 +162,7 @@ public class ConditionalOnMissingBeanTests {
 		this.contextRunner
 				.withUserConfiguration(ComponentScannedFactoryBeanBeanMethodConfiguration.class,
 						ConditionalOnFactoryBean.class, PropertyPlaceholderAutoConfiguration.class)
-				.run((context) -> assertThat(context.getBean(ExampleBean.class).toString()).isEqualTo("fromFactory"));
+				.run((context) -> assertThat(context.getBean(ScanBean.class).toString()).isEqualTo("fromFactory"));
 	}
 
 	@Test
@@ -169,7 +170,7 @@ public class ConditionalOnMissingBeanTests {
 		this.contextRunner
 				.withUserConfiguration(ComponentScannedFactoryBeanBeanMethodWithArgumentsConfiguration.class,
 						ConditionalOnFactoryBean.class, PropertyPlaceholderAutoConfiguration.class)
-				.run((context) -> assertThat(context.getBean(ExampleBean.class).toString()).isEqualTo("fromFactory"));
+				.run((context) -> assertThat(context.getBean(ScanBean.class).toString()).isEqualTo("fromFactory"));
 	}
 
 	@Test
@@ -617,9 +618,9 @@ public class ConditionalOnMissingBeanTests {
 
 	}
 
-	public static class ExampleFactoryBean implements FactoryBean<ExampleBean> {
+	static class ExampleFactoryBean implements FactoryBean<ExampleBean> {
 
-		public ExampleFactoryBean(String value) {
+		ExampleFactoryBean(String value) {
 			Assert.state(!value.contains("$"), "value should not contain '$'");
 		}
 
@@ -738,11 +739,11 @@ public class ConditionalOnMissingBeanTests {
 	}
 
 	@TestAnnotation
-	public static class ExampleBean {
+	static class ExampleBean {
 
 		private String value;
 
-		public ExampleBean(String value) {
+		ExampleBean(String value) {
 			this.value = value;
 		}
 
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/scan/ScanBean.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/scan/ScanBean.java
new file mode 100644
index 0000000000..2bb12a7756
--- /dev/null
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/scan/ScanBean.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2012-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.autoconfigure.condition.scan;
+
+public class ScanBean {
+
+	private String value;
+
+	public ScanBean(String value) {
+		this.value = value;
+	}
+
+	@Override
+	public String toString() {
+		return this.value;
+	}
+
+}
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/scan/ScanFactoryBean.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/scan/ScanFactoryBean.java
new file mode 100644
index 0000000000..0ec5d5d2c3
--- /dev/null
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/scan/ScanFactoryBean.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2012-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.autoconfigure.condition.scan;
+
+import org.springframework.beans.factory.FactoryBean;
+import org.springframework.util.Assert;
+
+class ScanFactoryBean implements FactoryBean<ScanBean> {
+
+	ScanFactoryBean(String value) {
+		Assert.state(!value.contains("$"), "value should not contain '$'");
+	}
+
+	@Override
+	public ScanBean getObject() {
+		return new ScanBean("fromFactory");
+	}
+
+	@Override
+	public Class<?> getObjectType() {
+		return ScanBean.class;
+	}
+
+	@Override
+	public boolean isSingleton() {
+		return false;
+	}
+
+}
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/scan/ScannedFactoryBeanConfiguration.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/scan/ScannedFactoryBeanConfiguration.java
index 0e11521265..0feab301af 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/scan/ScannedFactoryBeanConfiguration.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/scan/ScannedFactoryBeanConfiguration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,8 +17,6 @@
 package org.springframework.boot.autoconfigure.condition.scan;
 
 import org.springframework.beans.factory.FactoryBean;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBeanTests.ExampleBean;
-import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBeanTests.ExampleFactoryBean;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
@@ -32,8 +30,8 @@ import org.springframework.context.annotation.Configuration;
 public class ScannedFactoryBeanConfiguration {
 
 	@Bean
-	public FactoryBean<ExampleBean> exampleBeanFactoryBean() {
-		return new ExampleFactoryBean("foo");
+	public FactoryBean<ScanBean> exampleBeanFactoryBean() {
+		return new ScanFactoryBean("foo");
 	}
 
 }
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/scan/ScannedFactoryBeanWithBeanMethodArgumentsConfiguration.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/scan/ScannedFactoryBeanWithBeanMethodArgumentsConfiguration.java
index e18cc44b79..5cbed4c436 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/scan/ScannedFactoryBeanWithBeanMethodArgumentsConfiguration.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/scan/ScannedFactoryBeanWithBeanMethodArgumentsConfiguration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,6 @@
 
 package org.springframework.boot.autoconfigure.condition.scan;
 
-import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBeanTests.ExampleFactoryBean;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
@@ -35,8 +34,8 @@ public class ScannedFactoryBeanWithBeanMethodArgumentsConfiguration {
 	}
 
 	@Bean
-	public ExampleFactoryBean exampleBeanFactoryBean(Foo foo) {
-		return new ExampleFactoryBean("foo");
+	public ScanFactoryBean exampleBeanFactoryBean(Foo foo) {
+		return new ScanFactoryBean("foo");
 	}
 
 	static class Foo {
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/context/LifecycleAutoConfigurationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/context/LifecycleAutoConfigurationTests.java
index 818b7b0224..c252a31fdd 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/context/LifecycleAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/context/LifecycleAutoConfigurationTests.java
@@ -32,7 +32,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Andy Wilkinson
  */
-public class LifecycleAutoConfigurationTests {
+class LifecycleAutoConfigurationTests {
 
 	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
 			.withConfiguration(AutoConfigurations.of(LifecycleAutoConfiguration.class));
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/elasticsearch/ReactiveElasticsearchRepositoriesAutoConfigurationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/elasticsearch/ReactiveElasticsearchRepositoriesAutoConfigurationTests.java
index 41a561b2d6..a85791c56a 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/elasticsearch/ReactiveElasticsearchRepositoriesAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/elasticsearch/ReactiveElasticsearchRepositoriesAutoConfigurationTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -45,7 +45,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Brian Clozel
  */
 @Testcontainers(disabledWithoutDocker = true)
-public class ReactiveElasticsearchRepositoriesAutoConfigurationTests {
+class ReactiveElasticsearchRepositoriesAutoConfigurationTests {
 
 	@Container
 	static ElasticsearchContainer elasticsearch = new ElasticsearchContainer(DockerImageNames.elasticsearch())
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/elasticsearch/ReactiveElasticsearchRestClientAutoConfigurationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/elasticsearch/ReactiveElasticsearchRestClientAutoConfigurationTests.java
index 52e4135409..c1b7746bf3 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/elasticsearch/ReactiveElasticsearchRestClientAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/elasticsearch/ReactiveElasticsearchRestClientAutoConfigurationTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -45,7 +45,7 @@ import static org.mockito.Mockito.mock;
  * @author Brian Clozel
  */
 @Testcontainers(disabledWithoutDocker = true)
-public class ReactiveElasticsearchRestClientAutoConfigurationTests {
+class ReactiveElasticsearchRestClientAutoConfigurationTests {
 
 	@Container
 	static ElasticsearchContainer elasticsearch = new ElasticsearchContainer(DockerImageNames.elasticsearch())
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/neo4j/Neo4jReactiveRepositoriesAutoConfigurationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/neo4j/Neo4jReactiveRepositoriesAutoConfigurationTests.java
index 66afb613f5..c78b4a1426 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/neo4j/Neo4jReactiveRepositoriesAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/neo4j/Neo4jReactiveRepositoriesAutoConfigurationTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,7 +40,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Stephane Nicoll
  * @author Michael J. Simons
  */
-public class Neo4jReactiveRepositoriesAutoConfigurationTests {
+class Neo4jReactiveRepositoriesAutoConfigurationTests {
 
 	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
 			.withUserConfiguration(MockedDriverConfiguration.class)
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/neo4j/Neo4jRepositoriesAutoConfigurationIntegrationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/neo4j/Neo4jRepositoriesAutoConfigurationIntegrationTests.java
index bd33edf9a2..41b4c72487 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/neo4j/Neo4jRepositoriesAutoConfigurationIntegrationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/neo4j/Neo4jRepositoriesAutoConfigurationIntegrationTests.java
@@ -43,7 +43,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  */
 @SpringBootTest
 @Testcontainers(disabledWithoutDocker = true)
-public class Neo4jRepositoriesAutoConfigurationIntegrationTests {
+class Neo4jRepositoriesAutoConfigurationIntegrationTests {
 
 	@Container
 	private static final Neo4jContainer<?> neo4jServer = new Neo4jContainer<>(DockerImageNames.neo4j())
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/freemarker/FreeMarkerAutoConfigurationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/freemarker/FreeMarkerAutoConfigurationTests.java
index 27fa3f18cb..6b60297a2b 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/freemarker/FreeMarkerAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/freemarker/FreeMarkerAutoConfigurationTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,7 +37,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Kazuki Shimizu
  */
 @ExtendWith(OutputCaptureExtension.class)
-public class FreeMarkerAutoConfigurationTests {
+class FreeMarkerAutoConfigurationTests {
 
 	private final BuildOutput buildOutput = new BuildOutput(getClass());
 
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/packagestest/two/SecondConfiguration.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/packagestest/two/SecondConfiguration.java
index c8c5af4bb9..66a1bf0742 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/packagestest/two/SecondConfiguration.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/packagestest/two/SecondConfiguration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,11 +17,10 @@
 package org.springframework.boot.autoconfigure.packagestest.two;
 
 import org.springframework.boot.autoconfigure.AutoConfigurationPackage;
-import org.springframework.boot.autoconfigure.AutoConfigurationPackagesTests;
 import org.springframework.context.annotation.Configuration;
 
 /**
- * Sample configuration used in {@link AutoConfigurationPackagesTests}.
+ * Sample configuration used in {@code AutoConfigurationPackagesTests}.
  *
  * @author Oliver Gierke
  */
diff --git a/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/SpringBootTestWebEnvironmentDefinedPortTests.java b/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/SpringBootTestWebEnvironmentDefinedPortTests.java
index a8611240e3..0b7f718dae 100644
--- a/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/SpringBootTestWebEnvironmentDefinedPortTests.java
+++ b/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/SpringBootTestWebEnvironmentDefinedPortTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,7 +31,7 @@ import org.springframework.web.servlet.config.annotation.EnableWebMvc;
  */
 @DirtiesContext
 @SpringBootTest(webEnvironment = WebEnvironment.DEFINED_PORT, properties = { "server.port=0", "value=123" })
-public class SpringBootTestWebEnvironmentDefinedPortTests extends AbstractSpringBootTestWebServerWebEnvironmentTests {
+class SpringBootTestWebEnvironmentDefinedPortTests extends AbstractSpringBootTestWebServerWebEnvironmentTests {
 
 	@Configuration(proxyBeanMethods = false)
 	@EnableWebMvc
diff --git a/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/SpringBootTestWithActiveProfilesAndEnvironmentPropertyTests.java b/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/SpringBootTestWithActiveProfilesAndEnvironmentPropertyTests.java
index 6d069ef796..19ff569e93 100644
--- a/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/SpringBootTestWithActiveProfilesAndEnvironmentPropertyTests.java
+++ b/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/SpringBootTestWithActiveProfilesAndEnvironmentPropertyTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -42,7 +42,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 @SpringBootTest
 @ActiveProfiles({ "test1", "test2" })
 @ContextConfiguration(loader = SpringBootTestWithActiveProfilesAndEnvironmentPropertyTests.Loader.class)
-public class SpringBootTestWithActiveProfilesAndEnvironmentPropertyTests {
+class SpringBootTestWithActiveProfilesAndEnvironmentPropertyTests {
 
 	@Autowired
 	private Environment environment;
diff --git a/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/SpringBootTestWithActiveProfilesAndSystemEnvironmentPropertyTests.java b/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/SpringBootTestWithActiveProfilesAndSystemEnvironmentPropertyTests.java
index c5817e72b2..66b54c2caf 100644
--- a/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/SpringBootTestWithActiveProfilesAndSystemEnvironmentPropertyTests.java
+++ b/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/SpringBootTestWithActiveProfilesAndSystemEnvironmentPropertyTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,7 +44,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 @SpringBootTest
 @ActiveProfiles({ "test1", "test2" })
 @ContextConfiguration(loader = SpringBootTestWithActiveProfilesAndSystemEnvironmentPropertyTests.Loader.class)
-public class SpringBootTestWithActiveProfilesAndSystemEnvironmentPropertyTests {
+class SpringBootTestWithActiveProfilesAndSystemEnvironmentPropertyTests {
 
 	@Autowired
 	private Environment environment;
diff --git a/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/web/reactive/server/WebTestClientContextCustomizerWithoutSupportedHttpClientTests.java b/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/web/reactive/server/WebTestClientContextCustomizerWithoutSupportedHttpClientTests.java
index 2a83f992ce..4ce3b2dd7e 100644
--- a/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/web/reactive/server/WebTestClientContextCustomizerWithoutSupportedHttpClientTests.java
+++ b/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/web/reactive/server/WebTestClientContextCustomizerWithoutSupportedHttpClientTests.java
@@ -33,7 +33,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Andy Wilkinson
  */
 @ClassPathExclusions({ "reactor-netty*.jar", "jetty-client*.jar" })
-public class WebTestClientContextCustomizerWithoutSupportedHttpClientTests {
+class WebTestClientContextCustomizerWithoutSupportedHttpClientTests {
 
 	@Test
 	void createContextCustomizerWhenNoSupportedHttpClientIsAvailableShouldReturnNull() {
diff --git a/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/web/reactive/server/WebTestClientContextCustomizerWithoutWebfluxIntegrationTests.java b/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/web/reactive/server/WebTestClientContextCustomizerWithoutWebfluxIntegrationTests.java
index a94aabf798..8acb1f7dde 100644
--- a/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/web/reactive/server/WebTestClientContextCustomizerWithoutWebfluxIntegrationTests.java
+++ b/spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/web/reactive/server/WebTestClientContextCustomizerWithoutWebfluxIntegrationTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -34,7 +34,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Stephane Nicoll
  */
 @ClassPathExclusions("spring-webflux*.jar")
-public class WebTestClientContextCustomizerWithoutWebfluxIntegrationTests {
+class WebTestClientContextCustomizerWithoutWebfluxIntegrationTests {
 
 	@Test
 	void customizerIsNotCreatedWithoutWebClient() {
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/test/java/org/springframework/boot/buildpack/platform/build/BuildRequestTests.java b/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/test/java/org/springframework/boot/buildpack/platform/build/BuildRequestTests.java
index e78ff3145e..e13c2e1174 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/test/java/org/springframework/boot/buildpack/platform/build/BuildRequestTests.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/test/java/org/springframework/boot/buildpack/platform/build/BuildRequestTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,7 +44,7 @@ import static org.assertj.core.api.Assertions.entry;
  * @author Phillip Webb
  * @author Scott Frederick
  */
-public class BuildRequestTests {
+class BuildRequestTests {
 
 	@TempDir
 	File tempDir;
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/test/java/org/springframework/boot/buildpack/platform/docker/configuration/DockerConfigurationTests.java b/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/test/java/org/springframework/boot/buildpack/platform/docker/configuration/DockerConfigurationTests.java
index fcb734df23..e5ee7f51b7 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/test/java/org/springframework/boot/buildpack/platform/docker/configuration/DockerConfigurationTests.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/test/java/org/springframework/boot/buildpack/platform/docker/configuration/DockerConfigurationTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,7 +26,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Wei Jiang
  * @author Scott Frederick
  */
-public class DockerConfigurationTests {
+class DockerConfigurationTests {
 
 	@Test
 	void createDockerConfigurationWithDefaults() {
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/ImmutableNameAnnotationPropertiesTests.java b/spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/ImmutableNameAnnotationPropertiesTests.java
index 6dac888b7e..8000658dd9 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/ImmutableNameAnnotationPropertiesTests.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/ImmutableNameAnnotationPropertiesTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,7 +29,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Phillip Webb
  */
-public class ImmutableNameAnnotationPropertiesTests extends AbstractMetadataGenerationTests {
+class ImmutableNameAnnotationPropertiesTests extends AbstractMetadataGenerationTests {
 
 	@Test
 	void immutableNameAnnotationProperties() {
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/fieldvalues/javac/JavaCompilerFieldValuesProcessorTests.java b/spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/fieldvalues/javac/JavaCompilerFieldValuesProcessorTests.java
index 259bf3f623..2965ce4a2e 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/fieldvalues/javac/JavaCompilerFieldValuesProcessorTests.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/fieldvalues/javac/JavaCompilerFieldValuesProcessorTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,7 +28,7 @@ import org.springframework.boot.configurationprocessor.fieldvalues.FieldValuesPa
  *
  * @author Phillip Webb
  */
-public class JavaCompilerFieldValuesProcessorTests extends AbstractFieldValuesProcessorTests {
+class JavaCompilerFieldValuesProcessorTests extends AbstractFieldValuesProcessorTests {
 
 	@Override
 	protected FieldValuesParser createProcessor(ProcessingEnvironment env) {
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/tasks/bundling/BootBuildImageRegistryIntegrationTests.java b/spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/tasks/bundling/BootBuildImageRegistryIntegrationTests.java
index de7531dcec..240221f89b 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/tasks/bundling/BootBuildImageRegistryIntegrationTests.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/tasks/bundling/BootBuildImageRegistryIntegrationTests.java
@@ -49,7 +49,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 @GradleCompatibility
 @Testcontainers(disabledWithoutDocker = true)
 @Disabled("Disabled until differences between running locally and in CI can be diagnosed")
-public class BootBuildImageRegistryIntegrationTests {
+class BootBuildImageRegistryIntegrationTests {
 
 	@Container
 	static final RegistryContainer registry = new RegistryContainer().withStartupAttempts(5)
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/tasks/bundling/DockerSpecTests.java b/spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/tasks/bundling/DockerSpecTests.java
index b305b23b33..846bc7d684 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/tasks/bundling/DockerSpecTests.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/tasks/bundling/DockerSpecTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -32,7 +32,7 @@ import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
  * @author Wei Jiang
  * @author Scott Frederick
  */
-public class DockerSpecTests {
+class DockerSpecTests {
 
 	@Test
 	void asDockerConfigurationWithDefaults() {
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/BuildImageRegistryIntegrationTests.java b/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/BuildImageRegistryIntegrationTests.java
index d1b0bda10a..3a8de6021f 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/BuildImageRegistryIntegrationTests.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/BuildImageRegistryIntegrationTests.java
@@ -43,7 +43,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 @ExtendWith(MavenBuildExtension.class)
 @Testcontainers(disabledWithoutDocker = true)
 @Disabled("Disabled until differences between running locally and in CI can be diagnosed")
-public class BuildImageRegistryIntegrationTests extends AbstractArchiveIntegrationTests {
+class BuildImageRegistryIntegrationTests extends AbstractArchiveIntegrationTests {
 
 	@Container
 	static final RegistryContainer registry = new RegistryContainer().withStartupAttempts(5)
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/BuildImageTests.java b/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/BuildImageTests.java
index 90275280db..d10a82be14 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/BuildImageTests.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/BuildImageTests.java
@@ -41,7 +41,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  */
 @ExtendWith(MavenBuildExtension.class)
 @DisabledIfDockerUnavailable
-public class BuildImageTests extends AbstractArchiveIntegrationTests {
+class BuildImageTests extends AbstractArchiveIntegrationTests {
 
 	@TestTemplate
 	void whenBuildImageIsInvokedWithoutRepackageTheArchiveIsRepackagedOnTheFly(MavenBuild mavenBuild) {
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/BuildInfoIntegrationTests.java b/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/BuildInfoIntegrationTests.java
index b2d6bf15e8..6cdcfcc3a3 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/BuildInfoIntegrationTests.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/BuildInfoIntegrationTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,7 +37,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Andy Wilkinson
  */
 @ExtendWith(MavenBuildExtension.class)
-public class BuildInfoIntegrationTests {
+class BuildInfoIntegrationTests {
 
 	@TestTemplate
 	void buildInfoPropertiesAreGenerated(MavenBuild mavenBuild) {
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/EclipseM2eIntegrationTests.java b/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/EclipseM2eIntegrationTests.java
index ba056a5c63..6672c557e6 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/EclipseM2eIntegrationTests.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/java/org/springframework/boot/maven/EclipseM2eIntegrationTests.java
@@ -32,7 +32,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Phillip Webb
  */
-public class EclipseM2eIntegrationTests {
+class EclipseM2eIntegrationTests {
 
 	@Test // gh-21992
 	void pluginPomIncludesOptionalShadeDependency() throws Exception {
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/test/java/org/springframework/boot/maven/CustomLayersProviderTests.java b/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/test/java/org/springframework/boot/maven/CustomLayersProviderTests.java
index f67f3b7d10..5e5bceaea2 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/test/java/org/springframework/boot/maven/CustomLayersProviderTests.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/test/java/org/springframework/boot/maven/CustomLayersProviderTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,7 +40,7 @@ import static org.mockito.Mockito.mock;
  * @author Madhura Bhave
  * @author Scott Frederick
  */
-public class CustomLayersProviderTests {
+class CustomLayersProviderTests {
 
 	private CustomLayersProvider customLayersProvider;
 
diff --git a/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/test/java/org/springframework/boot/maven/DockerTests.java b/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/test/java/org/springframework/boot/maven/DockerTests.java
index a4421af41b..eb91cdc901 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/test/java/org/springframework/boot/maven/DockerTests.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/test/java/org/springframework/boot/maven/DockerTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,7 +31,7 @@ import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException
  * @author Wei Jiang
  * @author Scott Frederick
  */
-public class DockerTests {
+class DockerTests {
 
 	@Test
 	void asDockerConfigurationWithDefaults() {
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/ConfigTreeConfigDataLoaderTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/ConfigTreeConfigDataLoaderTests.java
index e473917bba..81821653af 100644
--- a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/ConfigTreeConfigDataLoaderTests.java
+++ b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/ConfigTreeConfigDataLoaderTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,7 +37,7 @@ import static org.mockito.Mockito.mock;
  * @author Madhura Bhave
  * @author Phillip Webb
  */
-public class ConfigTreeConfigDataLoaderTests {
+class ConfigTreeConfigDataLoaderTests {
 
 	private ConfigTreeConfigDataLoader loader = new ConfigTreeConfigDataLoader();
 
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/ConfigTreeConfigDataResourceTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/ConfigTreeConfigDataResourceTests.java
index 4bc1cb4a7c..58375348d9 100644
--- a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/ConfigTreeConfigDataResourceTests.java
+++ b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/ConfigTreeConfigDataResourceTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -30,7 +30,7 @@ import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException
  * @author Madhura Bhave
  * @author Phillip Webb
  */
-public class ConfigTreeConfigDataResourceTests {
+class ConfigTreeConfigDataResourceTests {
 
 	@Test
 	void constructorWhenPathStringIsNullThrowsException() {
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/StandardConfigDataLoaderTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/StandardConfigDataLoaderTests.java
index e4f38fbb24..3287efaf3e 100644
--- a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/StandardConfigDataLoaderTests.java
+++ b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/StandardConfigDataLoaderTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -34,7 +34,7 @@ import static org.mockito.Mockito.mock;
  * @author Madhura Bhave
  * @author Phillip Webb
  */
-public class StandardConfigDataLoaderTests {
+class StandardConfigDataLoaderTests {
 
 	private StandardConfigDataLoader loader = new StandardConfigDataLoader();
 
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/StandardConfigDataLocationResolverTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/StandardConfigDataLocationResolverTests.java
index cfca9fbe0e..37e5679ac4 100644
--- a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/StandardConfigDataLocationResolverTests.java
+++ b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/StandardConfigDataLocationResolverTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,7 +44,7 @@ import static org.mockito.Mockito.mock;
  * @author Madhura Bhave
  * @author Phillip Webb
  */
-public class StandardConfigDataLocationResolverTests {
+class StandardConfigDataLocationResolverTests {
 
 	private StandardConfigDataLocationResolver resolver;
 
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/StandardConfigDataResourceTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/StandardConfigDataResourceTests.java
index 9266af6e06..8c1734ee2a 100644
--- a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/StandardConfigDataResourceTests.java
+++ b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/config/StandardConfigDataResourceTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,7 +31,7 @@ import static org.mockito.Mockito.mock;
  * @author Madhura Bhave
  * @author Phillip Webb
  */
-public class StandardConfigDataResourceTests {
+class StandardConfigDataResourceTests {
 
 	StandardConfigDataReference reference = mock(StandardConfigDataReference.class);
 
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/bind/BoundPropertiesTrackingBindHandlerTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/bind/BoundPropertiesTrackingBindHandlerTests.java
index a90c29e895..6716785908 100644
--- a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/bind/BoundPropertiesTrackingBindHandlerTests.java
+++ b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/bind/BoundPropertiesTrackingBindHandlerTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -41,7 +41,7 @@ import static org.mockito.Mockito.verify;
  * @author Madhura Bhave
  */
 @ExtendWith(MockitoExtension.class)
-public class BoundPropertiesTrackingBindHandlerTests {
+class BoundPropertiesTrackingBindHandlerTests {
 
 	private List<ConfigurationPropertySource> sources = new ArrayList<>();
 
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/json/BasicJsonParserTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/json/BasicJsonParserTests.java
index 5c2ca8ba72..40c024afa2 100644
--- a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/json/BasicJsonParserTests.java
+++ b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/json/BasicJsonParserTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,7 +21,7 @@ package org.springframework.boot.json;
  *
  * @author Dave Syer
  */
-public class BasicJsonParserTests extends AbstractJsonParserTests {
+class BasicJsonParserTests extends AbstractJsonParserTests {
 
 	@Override
 	protected JsonParser getParser() {
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/json/GsonJsonParserTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/json/GsonJsonParserTests.java
index f2d5f3f17d..e6ccb7756b 100644
--- a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/json/GsonJsonParserTests.java
+++ b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/json/GsonJsonParserTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,7 +21,7 @@ package org.springframework.boot.json;
  *
  * @author Dave Syer
  */
-public class GsonJsonParserTests extends AbstractJsonParserTests {
+class GsonJsonParserTests extends AbstractJsonParserTests {
 
 	@Override
 	protected JsonParser getParser() {
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/json/YamlJsonParserTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/json/YamlJsonParserTests.java
index 928679b069..7b0b024e2c 100644
--- a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/json/YamlJsonParserTests.java
+++ b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/json/YamlJsonParserTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,7 +26,7 @@ import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
  *
  * @author Dave Syer
  */
-public class YamlJsonParserTests extends AbstractJsonParserTests {
+class YamlJsonParserTests extends AbstractJsonParserTests {
 
 	@Override
 	protected JsonParser getParser() {
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/RestTemplateBuilderClientHttpRequestInitializerTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/RestTemplateBuilderClientHttpRequestInitializerTests.java
index 520579d46e..b88018a003 100644
--- a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/RestTemplateBuilderClientHttpRequestInitializerTests.java
+++ b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/client/RestTemplateBuilderClientHttpRequestInitializerTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -43,7 +43,7 @@ import static org.mockito.Mockito.mock;
  * @author Ilya Lukyanovich
  * @author Phillip Webb
  */
-public class RestTemplateBuilderClientHttpRequestInitializerTests {
+class RestTemplateBuilderClientHttpRequestInitializerTests {
 
 	private final MockClientHttpRequest request = new MockClientHttpRequest();
 
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/context/WebServerApplicationContextTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/context/WebServerApplicationContextTests.java
index d7e13d9cb6..5325bd2a10 100644
--- a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/context/WebServerApplicationContextTests.java
+++ b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/context/WebServerApplicationContextTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,7 +29,7 @@ import static org.mockito.Mockito.mock;
  *
  * @author Phillip Webb
  */
-public class WebServerApplicationContextTests {
+class WebServerApplicationContextTests {
 
 	@Test
 	void hasServerNamespaceWhenContextIsNotWebServerApplicationContextReturnsFalse() {
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/servlet/NoSpringWebFilterRegistrationBeanTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/servlet/NoSpringWebFilterRegistrationBeanTests.java
index bdfba615d2..2eb325306b 100644
--- a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/servlet/NoSpringWebFilterRegistrationBeanTests.java
+++ b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/servlet/NoSpringWebFilterRegistrationBeanTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -30,7 +30,7 @@ import static org.mockito.ArgumentMatchers.eq;
  * @author Andy Wilkinson
  */
 @ClassPathExclusions("spring-web-*.jar")
-public class NoSpringWebFilterRegistrationBeanTests extends AbstractFilterRegistrationBeanTests {
+class NoSpringWebFilterRegistrationBeanTests extends AbstractFilterRegistrationBeanTests {
 
 	private final MockFilter filter = new MockFilter();
 
diff --git a/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-jersey/src/test/java/smoketest/jersey/JerseyFilterManagementPortTests.java b/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-jersey/src/test/java/smoketest/jersey/JerseyFilterManagementPortTests.java
index db7a9c5960..2615078f69 100644
--- a/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-jersey/src/test/java/smoketest/jersey/JerseyFilterManagementPortTests.java
+++ b/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-jersey/src/test/java/smoketest/jersey/JerseyFilterManagementPortTests.java
@@ -25,6 +25,6 @@ import org.springframework.test.context.TestPropertySource;
  * @author Andy Wilkinson
  */
 @TestPropertySource(properties = { "spring.jersey.type=filter", "server.servlet.register-default-servlet=true" })
-public class JerseyFilterManagementPortTests extends AbstractJerseyManagementPortTests {
+class JerseyFilterManagementPortTests extends AbstractJerseyManagementPortTests {
 
 }
diff --git a/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-jersey/src/test/java/smoketest/jersey/JerseyServletManagementPortTests.java b/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-jersey/src/test/java/smoketest/jersey/JerseyServletManagementPortTests.java
index 333454063d..1079a1be40 100644
--- a/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-jersey/src/test/java/smoketest/jersey/JerseyServletManagementPortTests.java
+++ b/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-jersey/src/test/java/smoketest/jersey/JerseyServletManagementPortTests.java
@@ -22,6 +22,6 @@ package smoketest.jersey;
  *
  * @author Andy Wilkinson
  */
-public class JerseyServletManagementPortTests extends AbstractJerseyManagementPortTests {
+class JerseyServletManagementPortTests extends AbstractJerseyManagementPortTests {
 
 }
diff --git a/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-rsocket/src/test/java/smoketest/rsocket/SampleRSocketApplicationTests.java b/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-rsocket/src/test/java/smoketest/rsocket/SampleRSocketApplicationTests.java
index 493b308a77..a3bab71de4 100644
--- a/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-rsocket/src/test/java/smoketest/rsocket/SampleRSocketApplicationTests.java
+++ b/spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-rsocket/src/test/java/smoketest/rsocket/SampleRSocketApplicationTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,7 +31,7 @@ import org.springframework.security.rsocket.metadata.UsernamePasswordMetadata;
 import org.springframework.util.MimeTypeUtils;
 
 @SpringBootTest(properties = "spring.rsocket.server.port=0")
-public class SampleRSocketApplicationTests {
+class SampleRSocketApplicationTests {
 
 	@LocalRSocketServerPort
 	private int port;