diff --git a/tests/utils.rs b/tests/utils.rs
index 936efc9..f303fc3 100644
--- a/tests/utils.rs
+++ b/tests/utils.rs
@@ -26,21 +26,21 @@ pub fn compare_output<R: BufRead, R2: BufRead>(command: R, expected: R2) {
         expected_lines.len(),
         command_lines.len()
     );
-    for (old, new) in expected_lines.iter().zip(command_lines.iter()) {
-        if new.starts_with("# ") && old.starts_with("# ") {
+    for (expected, command) in expected_lines.iter().zip(command_lines.iter()) {
+        if command.starts_with("# ") && expected.starts_with("# ") {
             continue;
-        } else if new.starts_with("# ") {
+        } else if command.starts_with("# ") {
             assert!(
                 false,
                 "comment line found in command output, but not in expected output"
             );
-        } else if old.starts_with("# ") {
+        } else if expected.starts_with("# ") {
             assert!(
                 false,
                 "comment line found in expected output, but not in command output"
             );
         }
 
-        assert_eq!(new, old);
+        assert_eq!(expected, command);
     }
 }