diff --git a/README.md b/README.md
index 0e83186..d8a9329 100644
--- a/README.md
+++ b/README.md
@@ -71,17 +71,17 @@ mold_cost_online_tool/
 2. **Set up environment variables**
    Create `.env.development` file for development:
    ```bash
-   POSTGRES_USER=postgres
-   POSTGRES_PASSWORD=postgres
+   POSTGRES_USER=your_db_user
+   POSTGRES_PASSWORD=your_db_password
    POSTGRES_DB=mold_cost
    DATABASE_HOST=db_development
-   SECRET_KEY=your-secret-key
+   SECRET_KEY=your-secret-key-here
    MAIL_SERVER=smtp.example.com
    MAIL_USERNAME=your-email@example.com
-   MAIL_PASSWORD=your-password
+   MAIL_PASSWORD=your-mail-password
    MAIL_DEFAULT_SENDER=your-email@example.com
    ADMIN_EMAIL=admin@example.com
-   ADMIN_PASSWORD=admin-password
+   ADMIN_PASSWORD=your-admin-password
    ```
 
 3. **Start the development environment**
@@ -122,8 +122,8 @@ mold_cost_online_tool/
    ```bash
    export FLASK_APP=run.py
    export FLASK_ENV=development
-   export SECRET_KEY=your-secret-key
-   export DATABASE_URL=postgresql://user:password@localhost/dbname
+   export SECRET_KEY=your-secret-key-here
+   export DATABASE_URL=postgresql://your_user:your_password@localhost/your_dbname
    ```
 
 6. **Initialize the database**
@@ -155,8 +155,8 @@ mold_cost_online_tool/
    ```bash
    FLASK_APP=run.py
    FLASK_ENV=production
-   SECRET_KEY=your-secure-secret-key
-   DATABASE_URL=postgresql://user:password@host/dbname
+   SECRET_KEY=your-secure-secret-key-here
+   DATABASE_URL=postgresql://your_user:your_password@your_host/your_dbname
    ```
 
 3. **Start the application**
diff --git a/deploy/db/migrations/run_migration.py b/deploy/db/migrations/run_migration.py
index 6b06703..14b0961 100644
--- a/deploy/db/migrations/run_migration.py
+++ b/deploy/db/migrations/run_migration.py
@@ -6,7 +6,7 @@ from pathlib import Path
 def get_db_url():
     """Get database URL from environment variables."""
     db_user = os.getenv('DB_USER', 'mold_user')
-    db_password = os.getenv('DB_PASSWORD', 'mold_password')
+    db_password = os.getenv('DB_PASSWORD', 'your_db_password_here')
     db_host = os.getenv('DB_HOST', 'localhost')
     db_port = os.getenv('DB_PORT', '5434')
     db_name = os.getenv('DB_NAME', 'mold_cost_calculator_dev')
diff --git a/deploy/db/migrations/test_mold_types.py b/deploy/db/migrations/test_mold_types.py
index 1fd1e63..e3ecc95 100644
--- a/deploy/db/migrations/test_mold_types.py
+++ b/deploy/db/migrations/test_mold_types.py
@@ -6,7 +6,7 @@ from pathlib import Path
 def get_db_url():
     """Get database URL from environment variables."""
     db_user = os.getenv('DB_USER', 'mold_user')
-    db_password = os.getenv('DB_PASSWORD', 'mold_password')
+    db_password = os.getenv('DB_PASSWORD', 'your_db_password_here')
     db_host = os.getenv('DB_HOST', 'localhost')
     db_port = os.getenv('DB_PORT', '5434')
     db_name = os.getenv('DB_NAME', 'mold_cost_calculator_dev')
diff --git a/tests/test_models.py b/tests/test_models.py
index 5c79a85..37c7c49 100644
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -1,5 +1,5 @@
 import os
-os.environ["SECRET_KEY"] = "XV@hLx*f5dezwYj36py$LKtMm6Qugyuv"
+os.environ["SECRET_KEY"] = os.getenv("TEST_SECRET_KEY", "test-secret-key-for-testing-only")
 
 from app import create_app, db
 from app.models import User, Quotation