diff --git a/infra/config/cq.cfg b/infra/config/cq.cfg
index 9a8bd03ef8..02250f4566 100644
--- a/infra/config/cq.cfg
+++ b/infra/config/cq.cfg
@@ -40,9 +40,8 @@ verifiers {
       builders { name: "ios_arm64_rel" }
       builders { name: "ios_dbg" }
       builders { name: "ios_rel" }
-      # Temporarily disabled: crbug.com/637666
-      #builders { name: "ios32_sim_dbg" }
-      #builders { name: "ios64_sim_dbg" }
+      builders { name: "ios32_sim_dbg" }
+      builders { name: "ios64_sim_dbg" }
       builders { name: "ios64_gn_dbg" }
       builders { name: "ios64_gn_rel" }
       builders { name: "ios_api_framework" }