diff --git a/src/test/java/com/tacitknowledge/util/migration/DistributedAutoPatchRollbackTest.java b/src/test/java/com/tacitknowledge/util/migration/DistributedAutoPatchRollbackTest.java
index 0bcb602..2addcf3 100644
--- a/src/test/java/com/tacitknowledge/util/migration/DistributedAutoPatchRollbackTest.java
+++ b/src/test/java/com/tacitknowledge/util/migration/DistributedAutoPatchRollbackTest.java
@@ -140,6 +140,10 @@ protected void setUp() throws Exception
         currentPatchInfoStore = MockBuilder.getPatchInfoStore(12);
     }
 
+    protected void tearDown() throws Exception {
+        System.clearProperty("migration.factory");
+        super.tearDown();
+    }
     /**
      * Make sure that the task loading works correctly
      * 
diff --git a/src/test/java/com/tacitknowledge/util/migration/jdbc/DistributedJdbcMigrationLauncherFactoryTest.java b/src/test/java/com/tacitknowledge/util/migration/jdbc/DistributedJdbcMigrationLauncherFactoryTest.java
index 971f280..9b8c693 100644
--- a/src/test/java/com/tacitknowledge/util/migration/jdbc/DistributedJdbcMigrationLauncherFactoryTest.java
+++ b/src/test/java/com/tacitknowledge/util/migration/jdbc/DistributedJdbcMigrationLauncherFactoryTest.java
@@ -96,6 +96,7 @@ protected void setUp() throws Exception
      */
     protected void tearDown() throws Exception
     {
+        System.clearProperty("migration.factory");
         super.tearDown();
     }