diff --git a/tests/basic/test_run_cmd.py b/tests/basic/test_run_cmd.py
index f2e2f6c86..1ad04f8d5 100644
--- a/tests/basic/test_run_cmd.py
+++ b/tests/basic/test_run_cmd.py
@@ -1,23 +1,27 @@
 import pytest
+
 from aider.run_cmd import run_cmd
 
+
 def test_run_cmd_echo():
-    command = 'echo Hello, World!'
+    command = "echo Hello, World!"
     exit_code, output = run_cmd(command)
-    
+
     assert exit_code == 0
-    assert output.strip() == 'Hello, World!'
+    assert output.strip() == "Hello, World!"
+
 
 def test_run_cmd_echo_with_quotes():
     command = 'echo "Hello, World!"'
     exit_code, output = run_cmd(command)
-    
+
     assert exit_code == 0
-    assert output.strip() == 'Hello, World!'
+    assert output.strip() == "Hello, World!"
+
 
 def test_run_cmd_invalid_command():
-    command = 'invalid_command_that_does_not_exist'
+    command = "invalid_command_that_does_not_exist"
     exit_code, output = run_cmd(command)
-    
+
     assert exit_code != 0
-    assert 'command not found' in output.lower() or 'is not recognized' in output.lower()
+    assert "command not found" in output.lower() or "is not recognized" in output.lower()