diff --git a/lib/src/runner/browser/chrome.dart b/lib/src/runner/browser/chrome.dart
index cedc53616..9dc58832b 100644
--- a/lib/src/runner/browser/chrome.dart
+++ b/lib/src/runner/browser/chrome.dart
@@ -79,7 +79,7 @@ class Chrome extends Browser {
       };
 
       if (!debug) return tryPort();
-      return getUnusedPort<Future<Process>>(tryPort);
+      return getUnusedPort<Process>(tryPort);
     }, remoteDebuggerCompleter.future);
   }
 
diff --git a/lib/src/runner/browser/dartium.dart b/lib/src/runner/browser/dartium.dart
index b17861fd9..b548a50da 100644
--- a/lib/src/runner/browser/dartium.dart
+++ b/lib/src/runner/browser/dartium.dart
@@ -117,7 +117,7 @@ class Dartium extends Browser {
       };
 
       if (!debug) return tryPort();
-      return getUnusedPort<Future<Process>>(tryPort);
+      return getUnusedPort<Process>(tryPort);
     }, observatoryCompleter.future, remoteDebuggerCompleter.future);
   }