diff --git a/compiler-plugin/src/test/java/com/google/devtools/ksp/test/KotlinKSPTestGenerated.java b/compiler-plugin/src/test/java/com/google/devtools/ksp/test/KotlinKSPTestGenerated.java
index 94da739d59..85379c1773 100644
--- a/compiler-plugin/src/test/java/com/google/devtools/ksp/test/KotlinKSPTestGenerated.java
+++ b/compiler-plugin/src/test/java/com/google/devtools/ksp/test/KotlinKSPTestGenerated.java
@@ -381,7 +381,7 @@ public KspTestFile createFile(@Nullable TestModule module, @NotNull String fileN
             }
 
             @Override
-            public TestModule createModule(@NotNull String name, @NotNull List<String> dependencies, @NotNull List<String> friends, @NotNull List<Integer> abiVersions) {
+            public TestModule createModule(@NotNull String name, @NotNull List<String> dependencies, @NotNull List<String> friends) {
                 return new TestModule(name, dependencies, friends);
             }
         });
diff --git a/gradle.properties b/gradle.properties
index 141b35b7b3..b6baff07a4 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,7 +1,7 @@
 # Copied from kotlinc
 org.gradle.jvmargs=-Duser.country=US -Dkotlin.daemon.jvm.options=-Xmx2200m -Dfile.encoding=UTF-8
 
-kotlinBaseVersion=1.6.0-dev-328
+kotlinBaseVersion=1.5.30-dev-2862
 agpBaseVersion=4.2.0
 intellijVersion=202.7660.26
 junitVersion=4.12
diff --git a/third_party/prebuilt/repo/test-infrastructure-utils-1.6.0-dev-328.jar b/third_party/prebuilt/repo/test-infrastructure-utils-1.5.30-dev-2862.jar
similarity index 100%
rename from third_party/prebuilt/repo/test-infrastructure-utils-1.6.0-dev-328.jar
rename to third_party/prebuilt/repo/test-infrastructure-utils-1.5.30-dev-2862.jar
diff --git a/third_party/prebuilt/repo/tests-common-1.6.0-dev-328.jar b/third_party/prebuilt/repo/tests-common-1.5.30-dev-2862.jar
similarity index 96%
rename from third_party/prebuilt/repo/tests-common-1.6.0-dev-328.jar
rename to third_party/prebuilt/repo/tests-common-1.5.30-dev-2862.jar
index 8c85ea1933..45f52dc08f 100644
Binary files a/third_party/prebuilt/repo/tests-common-1.6.0-dev-328.jar and b/third_party/prebuilt/repo/tests-common-1.5.30-dev-2862.jar differ
diff --git a/third_party/prebuilt/repo/tests-compiler-utils-1.6.0-dev-328.jar b/third_party/prebuilt/repo/tests-compiler-utils-1.5.30-dev-2862.jar
similarity index 80%
rename from third_party/prebuilt/repo/tests-compiler-utils-1.6.0-dev-328.jar
rename to third_party/prebuilt/repo/tests-compiler-utils-1.5.30-dev-2862.jar
index 1a95a0d123..4531b5e045 100644
Binary files a/third_party/prebuilt/repo/tests-compiler-utils-1.6.0-dev-328.jar and b/third_party/prebuilt/repo/tests-compiler-utils-1.5.30-dev-2862.jar differ
diff --git a/third_party/prebuilt/repo/tests-mutes-1.6.0-dev-328.jar b/third_party/prebuilt/repo/tests-mutes-1.5.30-dev-2862.jar
similarity index 100%
rename from third_party/prebuilt/repo/tests-mutes-1.6.0-dev-328.jar
rename to third_party/prebuilt/repo/tests-mutes-1.5.30-dev-2862.jar