diff --git a/Tone/shim/AudioContext.js b/Tone/shim/AudioContext.js
index 4ef7d8ff..9eb8b34d 100644
--- a/Tone/shim/AudioContext.js
+++ b/Tone/shim/AudioContext.js
@@ -18,6 +18,12 @@ define(["Tone/core/Tone", "Tone/shim/OfflineAudioContext"], function(Tone){
 		//not functionally equivalent
 		if (!AudioContext.prototype.resume){
 			AudioContext.prototype.resume = function(){
+				//play some silent audio to jumpstart the context
+				var buffer = this.createBuffer(1, 1, this.sampleRate);
+				var source = this.createBufferSource();
+				source.buffer = buffer;
+				source.connect(this.destination);
+				source.start(0);
 				return Promise.resolve();
 			};
 		}
diff --git a/gulp/karma.conf.js b/gulp/karma.conf.js
index 2afaebf4..d07b9f72 100644
--- a/gulp/karma.conf.js
+++ b/gulp/karma.conf.js
@@ -111,13 +111,13 @@ module.exports = function(config){
 				flags : ["--no-sandbox", "--use-fake-ui-for-media-stream", "--use-fake-device-for-media-stream", "--autoplay-policy=no-user-gesture-required"]
 			},
 			HeadlessFirefox : {
-		        base : "Firefox",
+				base : "Firefox",
 				flags : ["-headless"],
-		        prefs : {
-		            "media.navigator.permission.disabled" : true,
+				prefs : {
+					"media.navigator.permission.disabled" : true,
 					"focusmanager.testmode" : true
-		        }
-		    }
+				}
+			}
 		}
 	};