diff --git a/Math/CNTKMathTest/CPUSparseMatrixUnitTests.cpp b/Math/CNTKMathTest/CPUSparseMatrixUnitTests.cpp
index e4ffd7339..2fd4b0a8a 100644
--- a/Math/CNTKMathTest/CPUSparseMatrixUnitTests.cpp
+++ b/Math/CNTKMathTest/CPUSparseMatrixUnitTests.cpp
@@ -38,7 +38,7 @@ namespace CNTKMathTest
             }
 
             DenseMatrix DM1 = DM0.ColumnSlice(start, numCols);
-            DenseMatrix DM2 = SM0.ColumnSlice(start, numCols);
+            DenseMatrix DM2 = SM0.ColumnSliceToDense(start, numCols);
 
             Assert::IsTrue(DM1.IsEqualTo(DM2, 0.0001));
         }
diff --git a/Math/CNTKMathTest/GPUSparseMatrixUnitTests.cpp b/Math/CNTKMathTest/GPUSparseMatrixUnitTests.cpp
index 8d1bfcdbf..daa331fa0 100644
--- a/Math/CNTKMathTest/GPUSparseMatrixUnitTests.cpp
+++ b/Math/CNTKMathTest/GPUSparseMatrixUnitTests.cpp
@@ -410,11 +410,11 @@ namespace CNTKMathTest
             SM0.SetValue(M0);
 
             GPUMatrix<float> M1 = M0.ColumnSlice(0, 2);
-            GPUMatrix<float> SM1 = SM0.ColumnSlice(0, 2);
+            GPUMatrix<float> SM1 = SM0.ColumnSliceToDense(0, 2);
             Assert::IsTrue(M1.IsEqualTo(SM1, 0.0001f));
 
             GPUMatrix<float> M2 = M0.ColumnSlice(1, 2);
-            GPUMatrix<float> SM2 = SM0.ColumnSlice(1, 2);
+            GPUMatrix<float> SM2 = SM0.ColumnSliceToDense(1, 2);
             Assert::IsTrue(M2.IsEqualTo(SM2, 0.0001f));
 
             Assert::IsFalse(M1.IsEqualTo(SM2, 0.0001f));