diff --git a/src/materia/cli.py b/src/materia/cli.py
index de20c57..71b7df7 100644
--- a/src/materia/cli.py
+++ b/src/materia/cli.py
@@ -91,7 +91,7 @@ def pipeline_run(
 
     if result.success:
         typer.echo(result.output)
-        typer.echo(f"\n✓ Pipeline completed successfully")
+        typer.echo("\n✓ Pipeline completed successfully")
     else:
         typer.echo(result.error, err=True)
         raise typer.Exit(1)
diff --git a/tests/conftest.py b/tests/conftest.py
index b49ef15..28b08df 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,6 +1,5 @@
 """Pytest configuration and fixtures."""
 
-import os
 import pytest
 from unittest.mock import Mock, patch