diff --git a/scripts/release.py b/scripts/release.py
index e4ce1274c3..b4ac148236 100755
--- a/scripts/release.py
+++ b/scripts/release.py
@@ -112,9 +112,9 @@ def has_changes(path: Path, git_hash: GitHash) -> bool:
             text=True,
         )
 
-        changed_files = [Path(f) for f in output.stdout.splitlines()]
-        relevant_files = [f for f in changed_files if f.suffix in [".py", ".ts"]]
-        return len(relevant_files) >= 1
+        changed_files = output.stdout.splitlines()
+
+        return len(changed_files) >= 1
     except subprocess.CalledProcessError:
         return False
 
diff --git a/scripts/test_release.py b/scripts/test_release.py
new file mode 100644
index 0000000000..9e958bb520
--- /dev/null
+++ b/scripts/test_release.py
@@ -0,0 +1,72 @@
+"""Tests for release.py has_changes function."""
+
+import subprocess
+import tempfile
+from pathlib import Path
+
+from release import has_changes, GitHash
+
+
+def _run(cmd: str, cwd: Path) -> None:
+    subprocess.run(cmd.split(), cwd=cwd, check=True, capture_output=True)
+
+
+def _init_repo(tmp: Path) -> GitHash:
+    """Create a git repo with an initial commit and return its hash."""
+    _run("git init", tmp)
+    _run("git config user.email test@test.com", tmp)
+    _run("git config user.name Test", tmp)
+    (tmp / "README.md").write_text("init")
+    _run("git add -A", tmp)
+    _run("git commit -m init", tmp)
+    result = subprocess.run(
+        ["git", "rev-parse", "HEAD"],
+        cwd=tmp, check=True, capture_output=True, text=True,
+    )
+    return GitHash(result.stdout.strip())
+
+
+def test_no_changes():
+    with tempfile.TemporaryDirectory() as tmp:
+        tmp = Path(tmp)
+        git_hash = _init_repo(tmp)
+        assert has_changes(tmp, git_hash) is False
+
+
+def test_py_file_change():
+    with tempfile.TemporaryDirectory() as tmp:
+        tmp = Path(tmp)
+        git_hash = _init_repo(tmp)
+        (tmp / "server.py").write_text("print('hi')")
+        _run("git add -A", tmp)
+        _run("git commit -m add-py", tmp)
+        assert has_changes(tmp, git_hash) is True
+
+
+def test_lockfile_change():
+    """Lockfile-only changes must be detected -- this was the bug."""
+    with tempfile.TemporaryDirectory() as tmp:
+        tmp = Path(tmp)
+        git_hash = _init_repo(tmp)
+        (tmp / "uv.lock").write_text("lockfile content")
+        _run("git add -A", tmp)
+        _run("git commit -m add-lock", tmp)
+        assert has_changes(tmp, git_hash) is True
+
+
+def test_toml_change():
+    with tempfile.TemporaryDirectory() as tmp:
+        tmp = Path(tmp)
+        git_hash = _init_repo(tmp)
+        (tmp / "pyproject.toml").write_text("[project]\nname='x'")
+        _run("git add -A", tmp)
+        _run("git commit -m add-toml", tmp)
+        assert has_changes(tmp, git_hash) is True
+
+
+if __name__ == "__main__":
+    test_no_changes()
+    test_py_file_change()
+    test_lockfile_change()
+    test_toml_change()
+    print("All tests passed.")