diff --git a/test-deps/mock.js b/test-deps/mock.js
index 81304cbe..7c086b96 100644
--- a/test-deps/mock.js
+++ b/test-deps/mock.js
@@ -232,6 +232,7 @@ this.mock = (function (global) {
 				this.responseText = JSON.stringify(data)
 				this.readyState = 4
 				this.status = status || 200
+				this.onreadystatechange()
 				return this
 			}
 
diff --git a/test/mithril.mount.js b/test/mithril.mount.js
index d5f606d9..736f87a1 100644
--- a/test/mithril.mount.js
+++ b/test/mithril.mount.js
@@ -648,7 +648,7 @@ describe("m.mount()", function () {
 	})
 
 	function resolveXhr() {
-		mock.XMLHttpRequest.$instances.pop().$resolve().onreadystatechange()
+		mock.XMLHttpRequest.$instances.pop().$resolve()
 		mock.requestAnimationFrame.$resolve()
 	}
 
diff --git a/test/mithril.request.js b/test/mithril.request.js
index 945164dc..ed361bf4 100644
--- a/test/mithril.request.js
+++ b/test/mithril.request.js
@@ -5,7 +5,6 @@ describe("m.request()", function () {
 	function resolve() {
 		var xhr = mock.XMLHttpRequest.$instances.pop()
 		xhr.$resolve.apply(xhr, arguments)
-		xhr.onreadystatechange()
 		return xhr
 	}
 
@@ -182,8 +181,7 @@ describe("m.request()", function () {
 			data: {foo: 1}
 		}).then(null, error)
 
-		var xhr = mock.XMLHttpRequest.$instances.pop()
-		xhr.onreadystatechange()
+		var xhr = mock.XMLHttpRequest.$instances.pop().$resolve()
 
 		expect(xhr.$headers).to.have.property(
 			"Content-Type",
@@ -198,8 +196,7 @@ describe("m.request()", function () {
 			url: "test"
 		}).then(null, error)
 
-		var xhr = mock.XMLHttpRequest.$instances.pop()
-		xhr.onreadystatechange()
+		var xhr = mock.XMLHttpRequest.$instances.pop().$resolve()
 
 		expect(xhr.$headers).to.not.have.property("Content-Type")
 	})