diff --git a/shell.nix b/shell.nix
index d7b1ff3..1fa8b73 100644
--- a/shell.nix
+++ b/shell.nix
@@ -3,7 +3,7 @@
 with pkgs;
 
 mkShell {
-  buildInputs = [ dart flutter androidenv.androidPkgs_9_0.androidsdk jdk ];
+  buildInputs = [ flutter-dev androidenv.androidPkgs_9_0.androidsdk jdk ];
 
   ANDROID_HOME = "${androidenv.androidPkgs_9_0.androidsdk}/libexec/android-sdk";
   ANDROID_AVD_HOME = (toString ./.) + "/.android/avd";
diff --git a/test/widget_test.dart b/test/widget_test.dart
deleted file mode 100644
index 38982f5..0000000
--- a/test/widget_test.dart
+++ /dev/null
@@ -1,30 +0,0 @@
-// This is a basic Flutter widget test.
-//
-// To perform an interaction with a widget in your test, use the WidgetTester
-// utility that Flutter provides. For example, you can send tap and scroll
-// gestures. You can also use WidgetTester to find child widgets in the widget
-// tree, read text, and verify that the values of widget properties are correct.
-
-import 'package:flutter/material.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-import 'package:the_most_expensive_button/main.dart';
-
-void main() {
-  testWidgets('Counter increments smoke test', (WidgetTester tester) async {
-    // Build our app and trigger a frame.
-    await tester.pumpWidget(MyApp());
-
-    // Verify that our counter starts at 0.
-    expect(find.text('0'), findsOneWidget);
-    expect(find.text('1'), findsNothing);
-
-    // Tap the '+' icon and trigger a frame.
-    await tester.tap(find.byIcon(Icons.add));
-    await tester.pump();
-
-    // Verify that our counter has incremented.
-    expect(find.text('0'), findsNothing);
-    expect(find.text('1'), findsOneWidget);
-  });
-}