diff --git a/tests/discard/test-blkdiscard.pl b/tests/discard/test-blkdiscard.pl
index 77b72b9f6..e080350d7 100755
--- a/tests/discard/test-blkdiscard.pl
+++ b/tests/discard/test-blkdiscard.pl
@@ -114,4 +114,4 @@ my $trimmed_size = (stat ($disk))[12];
 print "trimmed size:\t$trimmed_size (blocks)\n";
 
 die "$0: looks like the blkdiscard operation did not work\n"
-    if $trimmed_size >= $full_size;
+    if $full_size - $trimmed_size < 1000;
diff --git a/tests/discard/test-discard.pl b/tests/discard/test-discard.pl
index 3f350b3a1..5e2f879c0 100755
--- a/tests/discard/test-discard.pl
+++ b/tests/discard/test-discard.pl
@@ -114,4 +114,4 @@ print "trimmed size:\t$trimmed_size (blocks)\n";
 #system "du -sh $disk";
 
 die "$0: looks like the -o discard mount option did not work\n"
-    if $trimmed_size >= $full_size;
+    if $full_size - $trimmed_size < 1000;
diff --git a/tests/discard/test-fstrim.pl b/tests/discard/test-fstrim.pl
index 54451b8e2..30bb855b3 100755
--- a/tests/discard/test-fstrim.pl
+++ b/tests/discard/test-fstrim.pl
@@ -122,4 +122,4 @@ print "trimmed size:\t$trimmed_size (blocks)\n";
 #system "du -sh $disk";
 
 die "$0: looks like the fstrim operation did not work\n"
-    if $trimmed_size >= $full_size;
+    if $full_size - $trimmed_size < 1000;