diff --git a/tools/bots/test_matrix.json b/tools/bots/test_matrix.json
index 5836ea109c1..f8402b24563 100644
--- a/tools/bots/test_matrix.json
+++ b/tools/bots/test_matrix.json
@@ -887,7 +887,9 @@
             "corelib_2",
             "lib_2",
             "dartdevc_native"
-          ]
+          ],
+          "shards": 1,
+          "fileset": "dart2js"
         },
         {
           "name": "ddc kernel tests",
@@ -995,7 +997,9 @@
             "corelib_2",
             "lib_2",
             "dartdevc_native"
-          ]
+          ],
+          "shards": 1,
+          "fileset": "dart2js"
         },
         {
           "name": "ddc kernel tests",