diff --git a/xFunc.Tests/Analyzers/TypeAnalyzerTests/MatrixTests.cs b/xFunc.Tests/Analyzers/TypeAnalyzerTests/MatrixTests.cs
index 952d467a2..ba9f5d63e 100644
--- a/xFunc.Tests/Analyzers/TypeAnalyzerTests/MatrixTests.cs
+++ b/xFunc.Tests/Analyzers/TypeAnalyzerTests/MatrixTests.cs
@@ -57,6 +57,42 @@ public void TestMatrixVector()
             Test(exp, ResultType.Matrix);
         }
 
+        [Fact]
+        public void TestMatrixUndefinedElement()
+        {
+            var exp = new Matrix(new Vector[] { new Vector(new[] { new Variable("x") }) });
+
+            Test(exp, ResultType.Undefined);
+        }
+
+        [Fact]
+        public void TestMatrixNotVectorElement()
+        {
+            DifferentParametersExpression exp = new Matrix(2, 2)
+            {
+                Arguments = new[] { new Number(2) }
+            };
+
+            TestDiffParamException(exp);
+        }
+
+        [Fact]
+        public void TestEmptyMatrix()
+        {
+            var exp = new Matrix(0, 0);
+
+            Test(exp, ResultType.Matrix);
+        }
+
+        [Fact]
+        public void TestNullMatrix()
+        {
+            var exp = new Matrix(0, 0);
+            exp.Arguments = null;
+
+            Test(exp, ResultType.Matrix);
+        }
+
         [Fact]
         public void TestDetermenantUndefined()
         {