diff --git a/pkg/test_runner/lib/src/test_suite.dart b/pkg/test_runner/lib/src/test_suite.dart
index a4c01b1b2a4b..fe5f5d2a080f 100644
--- a/pkg/test_runner/lib/src/test_suite.dart
+++ b/pkg/test_runner/lib/src/test_suite.dart
@@ -55,14 +55,16 @@ abstract class TestSuite {
   TestSuite(this.configuration, this.suiteName, this.statusFilePaths) {
     _environmentOverrides = {
       'DART_CONFIGURATION': configuration.configurationDirectory,
+      if (Platform.isWindows) 'DART_SUPPRESS_WER': '1',
+      if (Platform.isWindows && configuration.copyCoreDumps)
+        'DART_CRASHPAD_HANDLER':
+            Uri.base.resolve(buildDir + '/crashpad_handler.exe').toFilePath(),
+      if (configuration.chromePath != null)
+        'CHROME_PATH': Uri.base.resolve(configuration.chromePath).toFilePath(),
+      if (configuration.firefoxPath != null)
+        'FIREFOX_PATH':
+            Uri.base.resolve(configuration.firefoxPath).toFilePath(),
     };
-    if (Platform.isWindows) {
-      _environmentOverrides['DART_SUPPRESS_WER'] = '1';
-      if (configuration.copyCoreDumps) {
-        _environmentOverrides['DART_CRASHPAD_HANDLER'] =
-            Path(buildDir + '/crashpad_handler.exe').absolute.toNativePath();
-      }
-    }
   }
 
   Map<String, String> get environmentOverrides => _environmentOverrides;