diff --git a/tests/unittest/test_extend_patch.py b/tests/unittest/test_extend_patch.py
index 9f95f5f0..71537d48 100644
--- a/tests/unittest/test_extend_patch.py
+++ b/tests/unittest/test_extend_patch.py
@@ -182,4 +182,10 @@ class TestLoadLargeDiff:
 +                                some new content
 +                                another line
 """
-        assert patch == patch_expected
\ No newline at end of file
+        assert patch == patch_expected
+
+    def test_empty_inputs(self):
+        assert load_large_diff("test.py", "", "") == ""
+        assert load_large_diff("test.py", None, None) == ""
+        assert (load_large_diff("test.py", "content\n", "") ==
+                '--- \n+++ \n@@ -1 +1 @@\n-\n+content\n')
\ No newline at end of file