diff --git a/tests/scripts/run_tests.sh b/tests/scripts/run_tests.sh
index 86ca63a..52a2a17 100755
--- a/tests/scripts/run_tests.sh
+++ b/tests/scripts/run_tests.sh
@@ -30,6 +30,12 @@ function running {
     echo -e "\n\n#### RUN: $1\n"
 }
 
+# unmount the dirs lazily because sometimes some outside thing is still touching them
+function umount_dirs {
+    umount --lazy "$IMGDIR"
+    umount --lazy "$ISODIR"
+}
+
 [ -e "$ISODIR" ] || mkdir "$ISODIR"
 [ -e "$IMGDIR" ] || mkdir "$IMGDIR"
 
@@ -43,8 +49,7 @@ function ks_only {
     test_ks
 
     status "Add kickstart"
-    umount "$IMGDIR"
-    umount "$ISODIR"
+    umount_dirs
 }
 
 function test_ks {
@@ -71,8 +76,7 @@ function ks_serial {
     test_ks_serial
 
     status "Add kickstart and serial cmdline"
-    umount "$IMGDIR"
-    umount "$ISODIR"
+    umount_dirs
 }
 
 function test_ks_serial {
@@ -95,8 +99,7 @@ function new_volid {
     test_volid
 
     status "Use a new VOLID"
-    umount "$IMGDIR"
-    umount "$ISODIR"
+    umount_dirs
 }
 
 function test_volid {
@@ -118,8 +121,7 @@ function add_files {
     test_files
 
     status "Add files"
-    umount "$IMGDIR"
-    umount "$ISODIR"
+    umount_dirs
 }
 
 function test_files {
@@ -139,8 +141,7 @@ function run_all {
     test_files
 
     status "Use all the options"
-    umount "$IMGDIR"
-    umount "$ISODIR"
+    umount_dirs
 }