diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 8ab44d0cb..62ba53feb 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -1424,7 +1424,7 @@ run_component () {
 
     # Restore the build tree to a clean state.
     cleanup
-    current_component=""
+    unset current_component
 }
 
 # Preliminary setup