diff --git a/test/AudioEngine.js b/test/AudioEngine.js
index f9b1b5e..0e12087 100644
--- a/test/AudioEngine.js
+++ b/test/AudioEngine.js
@@ -6,6 +6,7 @@ const {AudioContext} = require('web-audio-test-api');
 tap.test('AudioEngine', t => {
     const audioEngine = new AudioEngine(new AudioContext());
 
+    t.plan(1);
     t.deepEqual(audioEngine.inputNode.toJSON(), {
         gain: {
             inputs: [],
diff --git a/test/__mocks__/AudioParam.js b/test/__mocks__/AudioParam.js
index 8ddc9a5..7cfd0b7 100644
--- a/test/__mocks__/AudioParam.js
+++ b/test/__mocks__/AudioParam.js
@@ -2,6 +2,12 @@ class AudioParamMock {
     setTargetAtTime (value /* , start, stop */) {
         this.value = value;
     }
+    setValueAtTime (value) {
+        this.value = value;
+    }
+    linearRampToValueAtTime (value) {
+        this.value = value;
+    }
 }
 
 module.exports = AudioParamMock;