diff --git a/shell_command/tests/test_convert_command.py b/shell_command/tests/test_convert_command.py
index 2127dbf..7cee10f 100644
--- a/shell_command/tests/test_convert_command.py
+++ b/shell_command/tests/test_convert_command.py
@@ -38,10 +38,6 @@
             "out.png",
         ]
 
-    def tearDown(self):
-        """Clean up after test."""
-        self.command = None
-    
 
 # Remove ShellCommandSharedTestCase from the namespace so we don't run
 # the shared tests twice. See <https://stackoverflow.com/a/22836015>.