diff --git a/src/test/java/org/mskcc/cbio/portal/scripts/incremental/ITIncrementalSamplesImport.java b/src/test/java/org/mskcc/cbio/portal/scripts/incremental/ITIncrementalSamplesImport.java
index 3d748686..77294dc6 100644
--- a/src/test/java/org/mskcc/cbio/portal/scripts/incremental/ITIncrementalSamplesImport.java
+++ b/src/test/java/org/mskcc/cbio/portal/scripts/incremental/ITIncrementalSamplesImport.java
@@ -92,6 +92,7 @@ public void testInsertNewSampleForExistingPatient() throws DaoException {
         ImportClinicalData importClinicalData = new ImportClinicalData(new String[] {
                 "--meta", metaFile.getAbsolutePath(),
                 "--data", dataFile.getAbsolutePath(),
+                "--overwrite-existing",
         });
         importClinicalData.run();
 
@@ -126,6 +127,7 @@ public void testInsertNewSampleForNonexistentPatient() throws DaoException {
         ImportClinicalData importClinicalData = new ImportClinicalData(new String[] {
                 "--meta", metaFile.getAbsolutePath(),
                 "--data", dataFile.getAbsolutePath(),
+                "--overwrite-existing",
         });
         importClinicalData.run();