diff --git a/internal/lsp/source/source_test.go b/internal/lsp/source/source_test.go
index b0e50d5a57..95922c8f9d 100644
--- a/internal/lsp/source/source_test.go
+++ b/internal/lsp/source/source_test.go
@@ -592,7 +592,7 @@ func (r *runner) Highlight(t *testing.T, src span.Span, locations []span.Span) {
 		t.Errorf("highlight failed for %s: %v", src.URI(), err)
 	}
 	if len(highlights) != len(locations) {
-		t.Errorf("got %d highlights for highlight at %v:%v:%v, expected %d", len(highlights), src.URI().Filename(), src.Start().Line(), src.Start().Column(), len(locations))
+		t.Fatalf("got %d highlights for highlight at %v:%v:%v, expected %d", len(highlights), src.URI().Filename(), src.Start().Line(), src.Start().Column(), len(locations))
 	}
 	// Check to make sure highlights have a valid range.
 	var results []span.Span