             description: "should NOT have called function with arguments at most 1 time")
     }
     
-    func testDidCallFunctionWithDontCareArgument() {
+    // MARK: Argument Enum Tests
+    
+    func testDontCareArgument() {
         // given
         let testClass = TestClass()
         

            .to(beFalse(), description: "should NOT have called function with non-nil and non-nil arguments")
    }
    
    func testDidCallFunctionWithNilArgument() {
        // given
        let testClass = TestClass()
        

            .to(beTrue(), description: "should have called function with non-nil and dont care arguments")
    }
    
    func testNonNilArgument() {
        // given
        let testClass = TestClass()
        
