diff --git a/src/builtin_test.cpp b/src/builtin_test.cpp
index 928d797d8..1e0245f8b 100644
--- a/src/builtin_test.cpp
+++ b/src/builtin_test.cpp
@@ -626,7 +626,7 @@ bool combining_expression::evaluate(wcstring_list_t &errors) {
     }
 
     errors.push_back(format_string(L"Unknown token type in %s", __func__));
-    return STATUS_INVALID_ARGS;
+    return false;
 }
 
 bool parenthetical_expression::evaluate(wcstring_list_t &errors) {