diff --git a/spring-test/src/main/java/org/springframework/test/context/TestContext.java b/spring-test/src/main/java/org/springframework/test/context/TestContext.java
index e345a74c7e2..87816cadfcd 100644
--- a/spring-test/src/main/java/org/springframework/test/context/TestContext.java
+++ b/spring-test/src/main/java/org/springframework/test/context/TestContext.java
@@ -102,6 +102,20 @@ public interface TestContext extends AttributeAccessor, Serializable {
 
 	/**
 	 * Get the {@linkplain Class test class} for this test context.
+	 * <p>Since JUnit Jupiter 5.12, if the
+	 * {@link org.springframework.test.context.junit.jupiter.SpringExtension
+	 * SpringExtension} is used with a {@linkplain
+	 * org.junit.jupiter.api.extension.TestInstantiationAwareExtension.ExtensionContextScope#TEST_METHOD
+	 * test-method scoped} {@link org.junit.jupiter.api.extension.ExtensionContext
+	 * ExtensionContext}, the {@code Class} returned from this method may refer
+	 * to the test class for the current {@linkplain #getTestMethod() test method},
+	 * which may be a {@link org.junit.jupiter.api.Nested @Nested} test class
+	 * within the class for the {@linkplain #getTestInstance() test instance}.
+	 * Thus, if you need consistent access to the class for the current test
+	 * instance within an implementation of
+	 * {@link TestExecutionListener#prepareTestInstance(TestContext)}, you should
+	 * invoke {@code testContext.getTestInstance().getClass()} instead of
+	 * {@code testContext.getTestClass()}.
 	 * @return the test class (never {@code null})
 	 */
 	Class<?> getTestClass();
diff --git a/spring-test/src/main/java/org/springframework/test/context/TestExecutionListener.java b/spring-test/src/main/java/org/springframework/test/context/TestExecutionListener.java
index ad180d685aa..b9f9a96f4cc 100644
--- a/spring-test/src/main/java/org/springframework/test/context/TestExecutionListener.java
+++ b/spring-test/src/main/java/org/springframework/test/context/TestExecutionListener.java
@@ -150,6 +150,19 @@ public interface TestExecutionListener {
 	 * {@link org.springframework.test.context.junit4.rules.SpringMethodRule
 	 * SpringMethodRule}). In any case, this method must be called prior to any
 	 * framework-specific lifecycle callbacks.
+	 * <p>Since JUnit Jupiter 5.12, if the
+	 * {@link org.springframework.test.context.junit.jupiter.SpringExtension
+	 * SpringExtension} is used with a {@linkplain
+	 * org.junit.jupiter.api.extension.TestInstantiationAwareExtension.ExtensionContextScope#TEST_METHOD
+	 * test-method scoped} {@link org.junit.jupiter.api.extension.ExtensionContext
+	 * ExtensionContext}, the {@link Class} returned from
+	 * {@link TestContext#getTestClass()} may refer to the test class for the
+	 * current {@linkplain TestContext#getTestMethod() test method}, which may be
+	 * a {@link org.junit.jupiter.api.Nested @Nested} test class within the class
+	 * for the {@linkplain TestContext#getTestInstance() test instance}. Thus, if
+	 * you need consistent access to the class for the current test instance, you
+	 * should invoke {@code testContext.getTestInstance().getClass()} instead of
+	 * {@code testContext.getTestClass()}.
 	 * <p>See the {@linkplain TestExecutionListener class-level documentation}
 	 * for details on wrapping behavior for listeners.
 	 * <p>The default implementation is <em>empty</em>. Can be overridden by