diff --git a/src/test/rustdoc-gui/method-margins.goml b/src/test/rustdoc-gui/method-margins.goml
index 397bcd40b36c4..ed36bcdec17d2 100644
--- a/src/test/rustdoc-gui/method-margins.goml
+++ b/src/test/rustdoc-gui/method-margins.goml
@@ -1,3 +1,4 @@
+// This test ensures that the margins on methods are coherent inside an impl block.
 goto: "file://" + |DOC_PATH| + "/test_docs/trait_members/struct.HasTrait.html#impl-TraitMembers-for-HasTrait"
 
 assert-count: ("#trait-implementations-list > .rustdoc-toggle", 1)