diff --git a/t/Group.t b/t/Group.t
index 2a99f1f88..1eb1bd25d 100644
--- a/t/Group.t
+++ b/t/Group.t
@@ -485,7 +485,7 @@ is( $mob[0]->isInGroup($gY->getId), 1, 'mob[0] is in group Y after setting dbQue
 is( $mob[0]->isInGroup($gZ->getId), 1, 'mob[0] isInGroup Z');
 
 ok( $mob[0]->userId ~~ $gY->getAllUsers, 'mob[0] in list of group Y users');
-ok( ! $mob[0]->userId ~~ $gZ->getUsers, 'mob[0] not in list of group Z users');
+ok( ! ($mob[0]->userId ~~ $gZ->getUsers), 'mob[0] not in list of group Z users');
 
 ok( $mob[0]->userId ~~ $gZ->getAllUsers, 'mob[0] in list of group Z users, recursively');