diff --git a/tools_webrtc/ios/client.webrtc/iOS64_Sim_Debug_(iOS_10.0).json b/tools_webrtc/ios/client.webrtc/iOS64_Sim_Debug_(iOS_10.0).json
index 93493f6579..f5c9d34fb6 100644
--- a/tools_webrtc/ios/client.webrtc/iOS64_Sim_Debug_(iOS_10.0).json
+++ b/tools_webrtc/ios/client.webrtc/iOS64_Sim_Debug_(iOS_10.0).json
@@ -19,11 +19,11 @@
       "include": "common_tests.json",
       "device type": "iPhone 6s",
       "os": "10.3",
+      "xcode build version": "8E3004b",
       "dimensions": [
         {
           "os": "Mac-10.12",
-          "pool": "Chrome",
-          "xcode_version": "9.0"
+          "pool": "Chrome"
         },
         {
           "os": "Mac-10.13.3",
diff --git a/tools_webrtc/ios/tryserver.webrtc/ios64_sim_ios10_dbg.json b/tools_webrtc/ios/tryserver.webrtc/ios64_sim_ios10_dbg.json
index 85c347813e..5e98758ae0 100644
--- a/tools_webrtc/ios/tryserver.webrtc/ios64_sim_ios10_dbg.json
+++ b/tools_webrtc/ios/tryserver.webrtc/ios64_sim_ios10_dbg.json
@@ -20,11 +20,11 @@
       "include": "common_tests.json",
       "device type": "iPhone 6s",
       "os": "10.3",
+      "xcode build version": "8E3004b",
       "dimensions": [
         {
           "os": "Mac-10.12",
-          "pool": "Chrome",
-          "xcode_version": "9.0"
+          "pool": "Chrome"
         },
         {
           "os": "Mac-10.13.3",