         }
     }
 
-    ModelIOTests.test("MDLAnimatedMatrix4x4/accessors") {
+    ModelIOTests.test("MDLAnimatedMatrix4x4/accessors")
+    .skip(.always("rdar://problem/50449570")).code {
         let animatedVal = MDLAnimatedMatrix4x4()
         let testCount = 10
         let testTimeVal = 5.0

        }
    }

    ModelIOTests.test("MDLAnimatedVector2/accessors") {
        let animatedVal = MDLAnimatedVector2()
        let testCount = 10
        let testTimeVal = 5.0

        }
    }

    ModelIOTests.test("MDLAnimatedVector3Array/accessors")
    .skip(.always("rdar://problem/50449570")).code {
        let elementCount = 10
        let animatedVal = MDLAnimatedVector3Array(elementCount: elementCount)
        let testCount = 10
