diff --git a/.prow.sh b/.prow.sh
index 40dc1c3d4..1d0d3f3a1 100755
--- a/.prow.sh
+++ b/.prow.sh
@@ -1,5 +1,7 @@
 #! /bin/bash
 
+CSI_PROW_TESTS="unit"
+
 . release-tools/prow.sh
 
 main