diff --git a/pkg/dynamic_modules/test/runner/util.dart b/pkg/dynamic_modules/test/runner/util.dart
index cfe7384eecf..aa611ad5491 100644
--- a/pkg/dynamic_modules/test/runner/util.dart
+++ b/pkg/dynamic_modules/test/runner/util.dart
@@ -14,12 +14,17 @@ import 'dart:ffi' show Abi;
 /// Note: we don't search for the directory "sdk" because this may not be
 /// available when running this test in a shard.
 Uri repoRoot = (() {
+  var root = Platform.environment['REPO_ROOT'];
+  if (root != null) return Uri.base.resolve(root);
   Uri script = Platform.script;
   var segments = script.pathSegments;
   var index = segments.lastIndexOf('pkg');
   if (index == -1) {
-    exitCode = 1;
-    throw "error: cannot find the root of the Dart SDK";
+    index = segments.lastIndexOf(_outFolder); // running from snapshot
+    if (index == -1) {
+      exitCode = 1;
+      throw "error: cannot find the root of the Dart SDK";
+    }
   }
   return script.resolve("../" * (segments.length - index - 1));
 })();
diff --git a/utils/dynamic_module_runner/BUILD.gn b/utils/dynamic_module_runner/BUILD.gn
index 42abc5ab7a8..d550347dff6 100644
--- a/utils/dynamic_module_runner/BUILD.gn
+++ b/utils/dynamic_module_runner/BUILD.gn
@@ -17,3 +17,8 @@ aot_snapshot("dynamic_module_runner_snapshot") {
       [ "--dynamic-interface=" + rebase_path(
             "$_dart_root/utils/dynamic_module_runner/dynamic_interface.yaml") ]
 }
+
+aot_snapshot("dynamic_modules_test_suite_snapshot") {
+  main_dart = "../../pkg/dynamic_modules/test/runner/main.dart"
+  name = "dynamic_modules_test_suite"
+}