diff --git a/diff.c b/diff.c
index 9251c47b72..4035a9374d 100644
--- a/diff.c
+++ b/diff.c
@@ -6717,6 +6717,16 @@ void diff_free(struct diff_options *options)
 	if (options->no_free)
 		return;
 
+	if (options->objfind) {
+		oidset_clear(options->objfind);
+		FREE_AND_NULL(options->objfind);
+	}
+
+	for (size_t i = 0; i < options->anchors_nr; i++)
+		free(options->anchors[i]);
+	FREE_AND_NULL(options->anchors);
+	options->anchors_nr = options->anchors_alloc = 0;
+
 	diff_free_file(options);
 	diff_free_ignore_regex(options);
 	clear_pathspec(&options->pathspec);
diff --git a/t/t4064-diff-oidfind.sh b/t/t4064-diff-oidfind.sh
index 6d8c8986fc..846f285f77 100755
--- a/t/t4064-diff-oidfind.sh
+++ b/t/t4064-diff-oidfind.sh
@@ -1,6 +1,8 @@
 #!/bin/sh
 
 test_description='test finding specific blobs in the revision walking'
+
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success 'setup ' '
diff --git a/t/t4065-diff-anchored.sh b/t/t4065-diff-anchored.sh
index b3f510f040..647537c12e 100755
--- a/t/t4065-diff-anchored.sh
+++ b/t/t4065-diff-anchored.sh
@@ -2,6 +2,7 @@
 
 test_description='anchored diff algorithm'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 test_expect_success '--anchored' '
diff --git a/t/t4069-remerge-diff.sh b/t/t4069-remerge-diff.sh
index 07323ebafe..888714bbd3 100755
--- a/t/t4069-remerge-diff.sh
+++ b/t/t4069-remerge-diff.sh
@@ -2,6 +2,7 @@
 
 test_description='remerge-diff handling'
 
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 # This test is ort-specific