diff --git a/test_shell_command.py b/test_shell_command.py
index 8bfbe33..ace98f3 100644
--- a/test_shell_command.py
+++ b/test_shell_command.py
@@ -103,8 +103,8 @@
         self.assertEqual(self.command.input_options, ["bar", "foo"])
         # prepend ["baz", 42] => ["baz", 42, "bar", "foo"]
         self.command.prepend_input_options(["baz", 42])
-        self.assertEqual
-        self.command.input_options, ["baz", 42, "bar", "foo"])
+        self.assertEqual(
+            self.command.input_options, ["baz", 42, "bar", "foo"])
 
     def test_append_output_options(self):
         """Test method ShellCommand.append_output_options().