diff --git a/tests/expected/bins_dynamic/stdio/popen.stdout b/tests/expected/bins_dynamic/stdio/popen.stdout
index 988b6f4a43..05f7216cbe 100644
--- a/tests/expected/bins_dynamic/stdio/popen.stdout
+++ b/tests/expected/bins_dynamic/stdio/popen.stdout
@@ -1,8 +1,8 @@
-1-never-gonna-give-you-up
-2-never-gonna-let-you-down
-3-never-gonna-run-around
-4-and-desert-you
-5-never-gonna-make-you-cry
-6-never-gonna-say-goodbye
-7-never-gonna-tell-a-lie
-8-and-hurt-you
+Line 1: 1-never-gonna-give-you-up
+Line 2: 2-never-gonna-let-you-down
+Line 3: 3-never-gonna-run-around
+Line 4: 4-and-desert-you
+Line 5: 5-never-gonna-make-you-cry
+Line 6: 6-never-gonna-say-goodbye
+Line 7: 7-never-gonna-tell-a-lie
+Line 8: 8-and-hurt-you