diff --git a/tests/unit/test_format.py b/tests/unit/test_format.py
new file mode 100644
index 0000000..82be88f
--- /dev/null
+++ b/tests/unit/test_format.py
@@ -0,0 +1,63 @@
+import unittest
+import os
+
+# Function to check if the .env file is created correctly
+def check_env_file_creation():
+    env_filepath = os.path.join(os.path.dirname(__file__), "../../.env")
+    
+    # Check if the .env file exists
+    if not os.path.exists(env_filepath):
+        return False, f".env file does not exist at {env_filepath}"
+    
+    # Check if the file contains the expected keys
+    with open(env_filepath, 'r') as env_file:
+        file_content = env_file.read()
+    
+    if 'API_EMAIL' not in file_content or 'API_KEY' not in file_content:
+        return False, "The .env file is missing 'API_EMAIL' or 'API_KEY'."
+    
+    return True, ".env file is correctly created with API credentials."
+
+# Function to check if the API_EMAIL and API_KEY values are formatted correctly
+def check_api_credentials():
+    env_filepath = os.path.join(os.path.dirname(__file__), "../../.env")
+    
+    with open(env_filepath, 'r') as env_file:
+        lines = env_file.readlines()
+    
+    api_email = None
+    api_key = None
+    
+    for line in lines:
+        if 'API_EMAIL' in line:
+            api_email = line.strip().split('=')[1].strip().replace('"', '')
+        elif 'API_KEY' in line:
+            api_key = line.strip().split('=')[1].strip().replace('"', '')
+    
+    if not api_email or not api_key:
+        return False, "API_EMAIL or API_KEY is missing or formatted incorrectly."
+    
+    # Validate the email format (basic validation for '@' symbol)
+    if '@' not in api_email:
+        return False, "API_EMAIL format is incorrect."
+    
+    # Validate API_KEY length (assuming it's a standard length for OpenWeatherMap keys)
+    if len(api_key) < 32:  # OpenWeatherMap keys are typically longer
+        return False, "API_KEY format is incorrect."
+    
+    return True, "API credentials are valid and properly formatted."
+
+class TestDataFormatConsistency(unittest.TestCase):
+    
+    # Test if the .env file is created correctly
+    def test_env_file_creation(self):
+        valid, message = check_env_file_creation()
+        self.assertTrue(valid, message)
+    
+    # Test if the API credentials are correct
+    def test_api_credentials(self):
+        valid, message = check_api_credentials()
+        self.assertTrue(valid, message)
+
+if __name__ == '__main__':
+    unittest.main()