diff --git a/run-tests.sh b/run-tests.sh
index 6b2d17c5..567f8a53 100644
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -10,7 +10,7 @@ if [[ ! -z "$TEST_SUITE" ]]; then
 	TEST_SUITE=""
 fi
 
-if [[ ! -z "$CI" ]]; then
+if [[ ! -z "$WHAT_CI" ]]; then
 	echo "Creating RAM disk…"
 
 	RAM_DISK="/media/ramdisk"