diff --git a/tools_webrtc/ios/client.webrtc/iOS32_Sim_Debug_(iOS_9.0).json b/tools_webrtc/ios/client.webrtc/iOS32_Sim_Debug_(iOS_9.0).json
index 03b272bb53..6bc6f8e9ed 100644
--- a/tools_webrtc/ios/client.webrtc/iOS32_Sim_Debug_(iOS_9.0).json
+++ b/tools_webrtc/ios/client.webrtc/iOS32_Sim_Debug_(iOS_9.0).json
@@ -24,7 +24,8 @@
         { "os": "Mac-10.13.4", "pool": "Chrome" },
         { "os": "Mac-10.13.5", "pool": "Chrome" },
         { "os": "Mac-10.13.6", "pool": "Chrome" }
-      ]
+      ],
+      "priority": 30
     }
   ]
 }
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 d8a71f665a..54f8301601 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
@@ -30,7 +30,8 @@
           "os": "Mac-10.13.3",
           "pool": "Chrome"
         }
-      ]
+      ],
+      "priority": 30
     }
   ]
 }
diff --git a/tools_webrtc/ios/client.webrtc/iOS64_Sim_Debug_(iOS_11.0).json b/tools_webrtc/ios/client.webrtc/iOS64_Sim_Debug_(iOS_11.0).json
index c303088b44..a139dd86ca 100644
--- a/tools_webrtc/ios/client.webrtc/iOS64_Sim_Debug_(iOS_11.0).json
+++ b/tools_webrtc/ios/client.webrtc/iOS64_Sim_Debug_(iOS_11.0).json
@@ -24,7 +24,8 @@
         { "os": "Mac-10.13.4", "pool": "Chrome" },
         { "os": "Mac-10.13.5", "pool": "Chrome" },
         { "os": "Mac-10.13.6", "pool": "Chrome" }
-      ]
+      ],
+      "priority": 30
     }
   ]
 }
diff --git a/tools_webrtc/ios/client.webrtc/iOS64_Sim_Debug_(iOS_9.0).json b/tools_webrtc/ios/client.webrtc/iOS64_Sim_Debug_(iOS_9.0).json
index bcf52d7283..d4c989b349 100644
--- a/tools_webrtc/ios/client.webrtc/iOS64_Sim_Debug_(iOS_9.0).json
+++ b/tools_webrtc/ios/client.webrtc/iOS64_Sim_Debug_(iOS_9.0).json
@@ -24,7 +24,8 @@
         { "os": "Mac-10.13.4", "pool": "Chrome" },
         { "os": "Mac-10.13.5", "pool": "Chrome" },
         { "os": "Mac-10.13.6", "pool": "Chrome" }
-      ]
+      ],
+      "priority": 30
     }
   ]
 }
diff --git a/tools_webrtc/ios/tryserver.webrtc/ios_sim_x64_dbg_ios10.json b/tools_webrtc/ios/tryserver.webrtc/ios_sim_x64_dbg_ios10.json
index 8cecf4a41e..d5f77bad94 100644
--- a/tools_webrtc/ios/tryserver.webrtc/ios_sim_x64_dbg_ios10.json
+++ b/tools_webrtc/ios/tryserver.webrtc/ios_sim_x64_dbg_ios10.json
@@ -25,7 +25,8 @@
         { "os": "Mac-10.13.4", "pool": "Chrome" },
         { "os": "Mac-10.13.5", "pool": "Chrome" },
         { "os": "Mac-10.13.6", "pool": "Chrome" }
-      ]
+      ],
+      "priority": 30
     }
   ]
 }
diff --git a/tools_webrtc/ios/tryserver.webrtc/ios_sim_x64_dbg_ios11.json b/tools_webrtc/ios/tryserver.webrtc/ios_sim_x64_dbg_ios11.json
index 3a5f7c0cf6..90c4212690 100644
--- a/tools_webrtc/ios/tryserver.webrtc/ios_sim_x64_dbg_ios11.json
+++ b/tools_webrtc/ios/tryserver.webrtc/ios_sim_x64_dbg_ios11.json
@@ -25,7 +25,8 @@
         { "os": "Mac-10.13.4", "pool": "Chrome" },
         { "os": "Mac-10.13.5", "pool": "Chrome" },
         { "os": "Mac-10.13.6", "pool": "Chrome" }
-      ]
+      ],
+      "priority": 30
     }
   ]
 }
diff --git a/tools_webrtc/ios/tryserver.webrtc/ios_sim_x64_dbg_ios9.json b/tools_webrtc/ios/tryserver.webrtc/ios_sim_x64_dbg_ios9.json
index 6c9848ee6d..c639ba756b 100644
--- a/tools_webrtc/ios/tryserver.webrtc/ios_sim_x64_dbg_ios9.json
+++ b/tools_webrtc/ios/tryserver.webrtc/ios_sim_x64_dbg_ios9.json
@@ -25,7 +25,8 @@
         { "os": "Mac-10.13.4", "pool": "Chrome" },
         { "os": "Mac-10.13.5", "pool": "Chrome" },
         { "os": "Mac-10.13.6", "pool": "Chrome" }
-      ]
+      ],
+      "priority": 30
     }
   ]
 }
diff --git a/tools_webrtc/ios/tryserver.webrtc/ios_sim_x86_dbg_ios9.json b/tools_webrtc/ios/tryserver.webrtc/ios_sim_x86_dbg_ios9.json
index 1eacc9295f..e55519fc76 100644
--- a/tools_webrtc/ios/tryserver.webrtc/ios_sim_x86_dbg_ios9.json
+++ b/tools_webrtc/ios/tryserver.webrtc/ios_sim_x86_dbg_ios9.json
@@ -25,7 +25,8 @@
         { "os": "Mac-10.13.4", "pool": "Chrome" },
         { "os": "Mac-10.13.5", "pool": "Chrome" },
         { "os": "Mac-10.13.6", "pool": "Chrome" }
-      ]
+      ],
+      "priority": 30
     }
   ]
 }