diff --git a/tools/testing/dart/compiler_configuration.dart b/tools/testing/dart/compiler_configuration.dart
index 5b4476b90c9..7280d08362f 100644
--- a/tools/testing/dart/compiler_configuration.dart
+++ b/tools/testing/dart/compiler_configuration.dart
@@ -710,8 +710,9 @@ class PrecompilerCompilerConfiguration extends CompilerConfiguration
 
     if (_isStrong) {
       args.add('--strong');
-      args.addAll(arguments.where((name) => !name.endsWith('.dart')));
-      args.add(tempKernelFile(tempDir));
+    }
+    if (useDfe) {
+      args.addAll(_replaceDartFiles(arguments, tempKernelFile(tempDir)));
     } else {
       args.addAll(arguments);
     }