diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..38de1de
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,57 @@
+import pytest
+import sys
+from pathlib import Path
+
+
+@pytest.fixture
+def sample_error_text():
+    return "NameError: name 'foo' is not defined"
+
+
+@pytest.fixture
+def sample_rules_dir(tmp_path):
+    rules_dir = tmp_path / "rules"
+    rules_dir.mkdir()
+    return rules_dir
+
+
+@pytest.fixture
+def sample_rule_file(tmp_path):
+    rule_file = tmp_path / "test_rules.yaml"
+    rule_file.write_text("""
+- id: test-rule-1
+  name: "Test Rule 1"
+  pattern: "TestError: (?P<message>.*)"
+  fix: "Replace with correct code: {message}"
+  description: "A test rule for testing"
+  severity: error
+  language: python
+  priority: 5
+""")
+    return rule_file
+
+
+@pytest.fixture
+def python_error_rules():
+    return [
+        {
+            'id': 'python-name-error',
+            'name': 'Python Name Error',
+            'pattern': "NameError: name '(?P<name>[a-zA-Z_][a-zA-Z0-9_]*)' is not defined",
+            'fix': "Define '{name}' before using it",
+            'description': 'Name is not defined',
+            'severity': 'error',
+            'language': 'python',
+            'priority': 9,
+        },
+        {
+            'id': 'python-type-error',
+            'name': 'Python Type Error',
+            'pattern': 'TypeError: .*',
+            'fix': 'Check types',
+            'description': 'Type error',
+            'severity': 'error',
+            'language': 'python',
+            'priority': 8,
+        },
+    ]