diff --git a/.ci.yaml b/.ci.yaml
index af0af158ba5..8ed4f604267 100644
--- a/.ci.yaml
+++ b/.ci.yaml
@@ -247,6 +247,9 @@ targets:
 
   # Wasm unit tests in master
   - name: Linux_web web_dart_unit_test_wasm_shard_1 master
+    # Broken on master. See flutter/flutter#170433 and
+    # flutter/flutter#170434
+    bringup: true
     recipe: packages/packages
     timeout: 60
     properties:
@@ -262,6 +265,9 @@ targets:
         }
 
   - name: Linux_web web_dart_unit_test_wasm_shard_2 master
+    # Broken on master. See flutter/flutter#170433 and
+    # flutter/flutter#170434
+    bringup: true
     recipe: packages/packages
     timeout: 60
     properties:
diff --git a/.ci/flutter_master.version b/.ci/flutter_master.version
index 42614a2ea99..ade147683a8 100644
--- a/.ci/flutter_master.version
+++ b/.ci/flutter_master.version
@@ -1 +1 @@
-7e30df2225f65141e0227e424986311b79d39505
+2d9977c14ebe9f181c99b00ffe2b632116f70099