diff --git a/simple-test.sh b/simple-test.sh
index efc93ca..ae5ffbd 100755
--- a/simple-test.sh
+++ b/simple-test.sh
@@ -88,7 +88,7 @@ function do_read_operations()
 }
 function cleanup()
 {
-    cat /proc/mounts | grep simplefs | awk '{print $2}' | xargs -r umount
+    cat /proc/mounts | fgrep ' simplefs ' | awk '{print $2}' | xargs -r umount
     lsmod | grep -q simplefs && rmmod "$root_pwd/simplefs.ko"
 
     # TODO: prompt deletion