diff --git a/spec/notification-spec.coffee b/spec/notification-spec.coffee
index 0ff4599a7..9c6edbfd6 100644
--- a/spec/notification-spec.coffee
+++ b/spec/notification-spec.coffee
@@ -3,6 +3,22 @@ Notification = require '../src/notification'
 describe "Notification", ->
   [notification] = []
 
+  it "throws an error when created with a non-string message", ->
+    expect(-> new Notification('error', null)).toThrow()
+    expect(-> new Notification('error', 3)).toThrow()
+    expect(-> new Notification('error', {})).toThrow()
+    expect(-> new Notification('error', false)).toThrow()
+
+  it "throws an error when created with non-object options", ->
+    expect(-> new Notification('error', 'message', 'foo')).toThrow()
+    expect(-> new Notification('error', 'message', 3)).toThrow()
+    expect(-> new Notification('error', 'message', false)).toThrow()
+
+  it "throws an error when created with a non-string detail", ->
+    expect(-> new Notification('error', 'message', detail: 3)).toThrow()
+    expect(-> new Notification('error', 'message', detail: false)).toThrow()
+    expect(-> new Notification('error', 'message', detail: {})).toThrow()
+
   describe "::getTimestamp()", ->
     it "returns a Date object", ->
       notification = new Notification('error', 'message!')