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-rw-r--r--tests/ui/diagnostic-flags/deduplicate-diagnostics.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/tests/ui/diagnostic-flags/deduplicate-diagnostics.rs b/tests/ui/diagnostic-flags/deduplicate-diagnostics.rs
index 299c1f5f461..48705266e35 100644
--- a/tests/ui/diagnostic-flags/deduplicate-diagnostics.rs
+++ b/tests/ui/diagnostic-flags/deduplicate-diagnostics.rs
@@ -1,3 +1,5 @@
+//! Test that `-Z deduplicate-diagnostics` flag properly deduplicates diagnostic messages.
+
 //@ revisions: duplicate deduplicate
 //@[deduplicate] compile-flags: -Z deduplicate-diagnostics=yes