diff --git a/jps-plugin/jps-tests/test/org/jetbrains/kotlin/jps/build/BaseKotlinJpsBuildTestCase.kt b/jps-plugin/jps-tests/test/org/jetbrains/kotlin/jps/build/BaseKotlinJpsBuildTestCase.kt
index 863e8b5457e..cda9bfa406c 100644
--- a/jps-plugin/jps-tests/test/org/jetbrains/kotlin/jps/build/BaseKotlinJpsBuildTestCase.kt
+++ b/jps-plugin/jps-tests/test/org/jetbrains/kotlin/jps/build/BaseKotlinJpsBuildTestCase.kt
@@ -31,5 +31,7 @@ abstract class BaseKotlinJpsBuildTestCase : JpsBuildTestCase() {
         JpsUtils.resetCaches()
         System.clearProperty("kotlin.jps.tests")
         super.tearDown()
+        myModel = null
+        myBuildParams.clear()
     }
 }
\ No newline at end of file