diff --git a/tests/project-root1.sh b/tests/project-root1.sh
index 52ead46..2f3c4c6 100755
--- a/tests/project-root1.sh
+++ b/tests/project-root1.sh
@@ -8,6 +8,8 @@ source ./_reformat-common.bash
 
 setUp() {
     cd "$DIR"/.. || exit
+    unset PROJECT_ROOT
+    unset WF_ROOT
 }
 
 testProjectRoot001() {