diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..c1b3d06
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,84 @@
+"""Pytest configuration and fixtures."""
+
+import pytest
+import tempfile
+import os
+from pathlib import Path
+
+
+@pytest.fixture
+def sample_json():
+    return {
+        "name": "test-project",
+        "version": "1.0.0",
+        "debug": True,
+        "database": {
+            "host": "localhost",
+            "port": 5432,
+            "ssl": False
+        },
+        "tags": ["python", "cli"]
+    }
+
+
+@pytest.fixture
+def sample_yaml():
+    return """name: test-project
+ version: '1.0.0'
+ debug: true
+ database:
+   host: localhost
+   port: 5432
+   ssl: false
+ tags:
+   - python
+   - cli
+ """
+
+
+@pytest.fixture
+def sample_toml():
+    return """name = "test-project"
+ version = "1.0.0"
+ debug = true
+ 
+ [database]
+ host = "localhost"
+ port = 5432
+ ssl = false
+ 
+ tags = ["python", "cli"]
+ """
+
+
+@pytest.fixture
+def sample_env():
+    return """NAME=test-project
+ VERSION=1.0.0
+ DEBUG=true
+ DATABASE_HOST=localhost
+ DATABASE_PORT=5432
+ DATABASE_SSL=false
+ TAGS=python,cli
+ """
+
+
+@pytest.fixture
+def temp_file():
+    def _create_temp_file(content="", suffix=".txt"):
+        fd, path = tempfile.mkstemp(suffix=suffix)
+        os.write(fd, content.encode())
+        os.close(fd)
+        yield path
+        os.unlink(path)
+    return _create_temp_file
+
+
+@pytest.fixture
+def temp_dir():
+    def _create_temp_dir():
+        path = tempfile.mkdtemp()
+        yield path
+        import shutil
+        shutil.rmtree(path)
+    return _create_temp_dir