diff --git a/tests/fixtures/existing-readme-backend/.gradle/buildOutputCleanup/buildOutputCleanup.lock b/tests/fixtures/existing-readme-backend/.gradle/buildOutputCleanup/buildOutputCleanup.lock
index 0508fde..0ed39e2 100644
Binary files a/tests/fixtures/existing-readme-backend/.gradle/buildOutputCleanup/buildOutputCleanup.lock and b/tests/fixtures/existing-readme-backend/.gradle/buildOutputCleanup/buildOutputCleanup.lock differ
diff --git a/tests/fixtures/existing-readme-backend/.gradle/buildOutputCleanup/cache.properties b/tests/fixtures/existing-readme-backend/.gradle/buildOutputCleanup/cache.properties
index 26a00d3..ca7a5dd 100644
--- a/tests/fixtures/existing-readme-backend/.gradle/buildOutputCleanup/cache.properties
+++ b/tests/fixtures/existing-readme-backend/.gradle/buildOutputCleanup/cache.properties
@@ -1,2 +1,2 @@
-#Fri Jul 24 13:25:57 KST 2026
-gradle.version=9.2.0
+#Fri Jul 24 13:26:01 KST 2026
+gradle.version=8.9
diff --git a/tests/fixtures/valid-backend/.gradle/buildOutputCleanup/buildOutputCleanup.lock b/tests/fixtures/valid-backend/.gradle/buildOutputCleanup/buildOutputCleanup.lock
index 2e30d15..2e8330a 100644
Binary files a/tests/fixtures/valid-backend/.gradle/buildOutputCleanup/buildOutputCleanup.lock and b/tests/fixtures/valid-backend/.gradle/buildOutputCleanup/buildOutputCleanup.lock differ
diff --git a/tests/fixtures/valid-backend/.gradle/buildOutputCleanup/cache.properties b/tests/fixtures/valid-backend/.gradle/buildOutputCleanup/cache.properties
index 73ba56e..ca7a5dd 100644
--- a/tests/fixtures/valid-backend/.gradle/buildOutputCleanup/cache.properties
+++ b/tests/fixtures/valid-backend/.gradle/buildOutputCleanup/cache.properties
@@ -1,2 +1,2 @@
-#Fri Jul 24 13:25:55 KST 2026
-gradle.version=9.2.0
+#Fri Jul 24 13:26:01 KST 2026
+gradle.version=8.9
diff --git a/tests/quality/backend-service/.gradle/8.9/fileHashes/fileHashes.lock b/tests/quality/backend-service/.gradle/8.9/fileHashes/fileHashes.lock
index be15845..d5cec02 100644
Binary files a/tests/quality/backend-service/.gradle/8.9/fileHashes/fileHashes.lock and b/tests/quality/backend-service/.gradle/8.9/fileHashes/fileHashes.lock differ
diff --git a/tests/quality/backend-service/.gradle/buildOutputCleanup/buildOutputCleanup.lock b/tests/quality/backend-service/.gradle/buildOutputCleanup/buildOutputCleanup.lock
index cacacf8..945f10a 100644
Binary files a/tests/quality/backend-service/.gradle/buildOutputCleanup/buildOutputCleanup.lock and b/tests/quality/backend-service/.gradle/buildOutputCleanup/buildOutputCleanup.lock differ