diff --git a/tests/test_archive.py b/tests/test_archive.py
index 24bf4f4..8276a00 100644
--- a/tests/test_archive.py
+++ b/tests/test_archive.py
@@ -79,3 +79,25 @@ def test_archive_respects_fastapicloudignore(tmp_path: Path) -> None:
             "main.py",
             "config.py",
         }
+
+
+def test_archive_respects_fastapicloudignore_unignore(tmp_path: Path) -> None:
+    """Test we can use .fastapicloudignore to unignore files inside .gitignore"""
+    # Create test files
+    (tmp_path / "main.py").write_text("print('hello')")
+    (tmp_path / "static/build").mkdir(exist_ok=True, parents=True)
+    (tmp_path / "static/build/style.css").write_text("body { background: #bada55 }")
+    # Rignore needs a .git folder to make .gitignore work
+    (tmp_path / ".git").mkdir(exist_ok=True, parents=True)
+    (tmp_path / ".gitignore").write_text("build/")
+
+    # Create .fastapicloudignore file
+    (tmp_path / ".fastapicloudignore").write_text("!static/build")
+
+    # Create archive
+    tar_path = archive(tmp_path)
+
+    # Verify ignored files are excluded
+    with tarfile.open(tar_path, "r") as tar:
+        names = tar.getnames()
+        assert set(names) == {"main.py", "static/build/style.css"}