diff --git a/tests/discard/test-discard.pl b/tests/discard/test-discard.pl
index 5e2f879c0..dbcf6a5b3 100755
--- a/tests/discard/test-discard.pl
+++ b/tests/discard/test-discard.pl
@@ -106,7 +106,7 @@ die "$0: surprising result: full size <= original size\n"
 # Remove the file and check the filesystem is trimmed automatically.
 
 $g->rm ("/data");
-$g->sync ();
+$g->shutdown ();
 $g->close ();
 
 my $trimmed_size = (stat ($disk))[12];
diff --git a/tests/discard/test-fstrim.pl b/tests/discard/test-fstrim.pl
index 30bb855b3..cbd28bfb2 100755
--- a/tests/discard/test-fstrim.pl
+++ b/tests/discard/test-fstrim.pl
@@ -114,7 +114,7 @@ die "$0: surprising result: full size <= original size\n"
 
 $g->rm ("/data");
 $g->fstrim ("/");
-$g->sync ();
+$g->shutdown ();
 $g->close ();
 
 my $trimmed_size = (stat ($disk))[12];