diff --git a/spring-core/src/test/java/org/springframework/util/ExponentialBackOffTests.java b/spring-core/src/test/java/org/springframework/util/backoff/ExponentialBackOffTests.java
similarity index 97%
rename from spring-core/src/test/java/org/springframework/util/ExponentialBackOffTests.java
rename to spring-core/src/test/java/org/springframework/util/backoff/ExponentialBackOffTests.java
index c8e0cd920f2..39ea225f2ed 100644
--- a/spring-core/src/test/java/org/springframework/util/ExponentialBackOffTests.java
+++ b/spring-core/src/test/java/org/springframework/util/backoff/ExponentialBackOffTests.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.util;
+package org.springframework.util.backoff;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -22,9 +22,6 @@ import java.util.stream.IntStream;
 
 import org.junit.jupiter.api.Test;
 
-import org.springframework.util.backoff.BackOffExecution;
-import org.springframework.util.backoff.ExponentialBackOff;
-
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
 import static org.assertj.core.api.Assertions.assertThatNoException;
diff --git a/spring-core/src/test/java/org/springframework/util/FixedBackOffTests.java b/spring-core/src/test/java/org/springframework/util/backoff/FixedBackOffTests.java
similarity index 95%
rename from spring-core/src/test/java/org/springframework/util/FixedBackOffTests.java
rename to spring-core/src/test/java/org/springframework/util/backoff/FixedBackOffTests.java
index 9885847b534..9d97a2593c9 100644
--- a/spring-core/src/test/java/org/springframework/util/FixedBackOffTests.java
+++ b/spring-core/src/test/java/org/springframework/util/backoff/FixedBackOffTests.java
@@ -14,13 +14,10 @@
  * limitations under the License.
  */
 
-package org.springframework.util;
+package org.springframework.util.backoff;
 
 import org.junit.jupiter.api.Test;
 
-import org.springframework.util.backoff.BackOffExecution;
-import org.springframework.util.backoff.FixedBackOff;
-
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**