diff --git a/tests/test_quality_gates.py b/tests/test_quality_gates.py
new file mode 100644
index 00000000..fef0e721
--- /dev/null
+++ b/tests/test_quality_gates.py
@@ -0,0 +1,165 @@
+"""Tests for CI Automation Gate and Task Gate.
+
+Tests the quality gate infrastructure:
+- ci_automation_gate.py: function length, linting, trailing whitespace
+- task_gate.py: pre/post task validation
+"""
+
+import json
+import os
+import tempfile
+from pathlib import Path
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+import sys
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent / "scripts"))
+
+from ci_automation_gate import QualityGate
+
+
+# =========================================================================
+# QualityGate — ci_automation_gate.py
+# =========================================================================
+
+class TestQualityGateLinting:
+    """Test trailing whitespace and final newline checks."""
+
+    def test_clean_file_passes(self, tmp_path):
+        f = tmp_path / "clean.py"
+        f.write_text("def foo():\n    return 1\n")
+        gate = QualityGate(fix=False)
+        gate.check_file(f)
+        assert gate.failures == 0
+        assert gate.warnings == 0
+
+    def test_trailing_whitespace_warns(self, tmp_path):
+        f = tmp_path / "messy.py"
+        f.write_text("def foo():   \n    return 1\n")
+        gate = QualityGate(fix=False)
+        gate.check_file(f)
+        assert gate.warnings >= 1
+        assert gate.failures == 0
+
+    def test_missing_final_newline_warns(self, tmp_path):
+        f = tmp_path / "no_newline.py"
+        f.write_text("def foo():\n    return 1")
+        gate = QualityGate(fix=False)
+        gate.check_file(f)
+        assert gate.warnings >= 1
+
+    def test_fix_mode_cleans_whitespace(self, tmp_path):
+        f = tmp_path / "messy.py"
+        f.write_text("def foo():   \n    return 1\n")
+        gate = QualityGate(fix=True)
+        gate.check_file(f)
+        fixed = f.read_text()
+        assert "   \n" not in fixed  # trailing spaces removed
+        assert fixed.endswith("\n")
+
+    def test_fix_mode_adds_final_newline(self, tmp_path):
+        f = tmp_path / "no_newline.py"
+        f.write_text("def foo():\n    return 1")
+        gate = QualityGate(fix=True)
+        gate.check_file(f)
+        fixed = f.read_text()
+        assert fixed.endswith("\n")
+
+
+class TestQualityGateFunctionLength:
+    """Test function length detection for JS/TS files."""
+
+    def test_short_function_passes(self, tmp_path):
+        f = tmp_path / "short.js"
+        f.write_text("function foo() {\n  return 1;\n}\n")
+        gate = QualityGate(fix=False)
+        gate.check_file(f)
+        assert gate.failures == 0
+
+    def test_long_function_warns(self, tmp_path):
+        body = "\n".join(f"  console.log({i});" for i in range(25))
+        f = tmp_path / "long.js"
+        f.write_text(f"function foo() {{\n{body}\n}}\n")
+        gate = QualityGate(fix=False)
+        gate.check_file(f)
+        assert gate.warnings >= 1
+
+    def test_very_long_function_fails(self, tmp_path):
+        body = "\n".join(f"  console.log({i});" for i in range(55))
+        f = tmp_path / "huge.js"
+        f.write_text(f"function foo() {{\n{body}\n}}\n")
+        gate = QualityGate(fix=False)
+        gate.check_file(f)
+        assert gate.failures >= 1
+
+    def test_python_files_skip_length_check(self, tmp_path):
+        """Python files should not trigger JS function length regex."""
+        body = "\n".join(f"    x = {i}" for i in range(60))
+        f = tmp_path / "long.py"
+        f.write_text(f"def foo():\n{body}\n    return x\n")
+        gate = QualityGate(fix=False)
+        gate.check_file(f)
+        assert gate.failures == 0  # JS regex won't match Python
+
+    def test_non_code_files_skipped(self, tmp_path):
+        f = tmp_path / "readme.md"
+        f.write_text("# Hello   \n\nSome text")
+        gate = QualityGate(fix=False)
+        gate.check_file(f)
+        # .md files should be skipped entirely
+        assert gate.failures == 0
+        assert gate.warnings == 0
+
+
+class TestQualityGateRun:
+    """Test the full directory scan."""
+
+    def test_run_exits_1_on_failure(self, tmp_path):
+        body = "\n".join(f"  console.log({i});" for i in range(55))
+        f = tmp_path / "huge.js"
+        f.write_text(f"function foo() {{\n{body}\n}}\n")
+        gate = QualityGate(fix=False)
+        with pytest.raises(SystemExit) as exc:
+            gate.run(str(tmp_path))
+        assert exc.value.code == 1
+
+    def test_run_exits_0_on_clean(self, tmp_path):
+        f = tmp_path / "clean.py"
+        f.write_text("x = 1\n")
+        gate = QualityGate(fix=False)
+        gate.run(str(tmp_path))  # should not raise
+        assert gate.failures == 0
+
+    def test_run_skips_node_modules(self, tmp_path):
+        nm = tmp_path / "node_modules"
+        nm.mkdir()
+        bad = nm / "huge.js"
+        body = "\n".join(f"  console.log({i});" for i in range(55))
+        bad.write_text(f"function foo() {{\n{body}\n}}\n")
+        gate = QualityGate(fix=False)
+        gate.run(str(tmp_path))
+        assert gate.failures == 0  # node_modules skipped
+
+
+# =========================================================================
+# Task Gate — task_gate.py (integration-level tests)
+# =========================================================================
+
+class TestTaskGateImports:
+    """Verify task_gate module is importable."""
+
+    def test_import_task_gate(self):
+        from task_gate import FILTER_TAGS, AGENT_USERNAMES
+        assert isinstance(FILTER_TAGS, list)
+        assert len(FILTER_TAGS) > 0
+        assert isinstance(AGENT_USERNAMES, set)
+        assert "timmy" in AGENT_USERNAMES
+
+    def test_filter_tags_contain_epic(self):
+        from task_gate import FILTER_TAGS
+        assert any("EPIC" in tag for tag in FILTER_TAGS)
+
+    def test_filter_tags_contain_permanent(self):
+        from task_gate import FILTER_TAGS
+        assert any("PERMANENT" in tag for tag in FILTER_TAGS)