diff --git a/spring-test/src/main/java/org/springframework/test/context/aot/TestContextAotGenerator.java b/spring-test/src/main/java/org/springframework/test/context/aot/TestContextAotGenerator.java
index d3fa761afd..438b9d7a38 100644
--- a/spring-test/src/main/java/org/springframework/test/context/aot/TestContextAotGenerator.java
+++ b/spring-test/src/main/java/org/springframework/test/context/aot/TestContextAotGenerator.java
@@ -17,6 +17,7 @@
 package org.springframework.test.context.aot;
 
 import java.util.Arrays;
+import java.util.HashSet;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
@@ -178,18 +179,27 @@ public class TestContextAotGenerator {
 
 			MultiValueMap<MergedContextConfiguration, Class<?>> mergedConfigMappings = new LinkedMultiValueMap<>();
 			ClassLoader classLoader = getClass().getClassLoader();
+			Set<String> visitedTestClassNames = new HashSet<>();
 			testClasses.forEach(testClass -> {
-				MergedContextConfiguration mergedConfig = buildMergedContextConfiguration(testClass);
-				mergedConfigMappings.add(mergedConfig, testClass);
-				collectRuntimeHintsRegistrarClasses(testClass, coreRuntimeHintsRegistrarClasses);
-				reflectiveRuntimeHintsRegistrar.registerRuntimeHints(this.runtimeHints, testClass);
-				this.testRuntimeHintsRegistrars.forEach(registrar -> {
-					if (logger.isTraceEnabled()) {
-						logger.trace("Processing RuntimeHints contribution from class [%s]"
-								.formatted(registrar.getClass().getCanonicalName()));
+				String testClassName = testClass.getName();
+				if (visitedTestClassNames.add(testClassName)) {
+					MergedContextConfiguration mergedConfig = buildMergedContextConfiguration(testClass);
+					mergedConfigMappings.add(mergedConfig, testClass);
+					collectRuntimeHintsRegistrarClasses(testClass, coreRuntimeHintsRegistrarClasses);
+					reflectiveRuntimeHintsRegistrar.registerRuntimeHints(this.runtimeHints, testClass);
+					this.testRuntimeHintsRegistrars.forEach(registrar -> {
+						if (logger.isTraceEnabled()) {
+							logger.trace("Processing RuntimeHints contribution from class [%s]"
+									.formatted(registrar.getClass().getCanonicalName()));
+						}
+						registrar.registerHints(this.runtimeHints, testClass, classLoader);
+					});
+				}
+				else {
+					if (logger.isDebugEnabled()) {
+						logger.debug("Skipping duplicate test class: " + testClassName);
 					}
-					registrar.registerHints(this.runtimeHints, testClass, classLoader);
-				});
+				}
 			});
 
 			coreRuntimeHintsRegistrarClasses.stream()