1 files changed, 1 insertions, 1 deletions
diff --git a/tests/testdata/run/textproto.ts b/tests/testdata/run/textproto.ts
index 7297fc446..f35ab6734 100644
--- a/tests/testdata/run/textproto.ts
+++ b/tests/testdata/run/textproto.ts
@@ -152,7 +152,7 @@ export class TextProtoReader {
       //TODO(SmashingQuasar): Kept skipSpace to preserve behavior but it should be looked into to check if it makes sense when this is used.
 
       if (r !== null && this.skipSpace(r.line) !== 0) {
-        line = concat(line, r.line);
+        line = concat([line, r.line]);
       }
     } while (r !== null && r.more);