diff --git a/unsupported/test/cxx11_tensor_contract_sycl.cpp b/unsupported/test/cxx11_tensor_contract_sycl.cpp
index 41acd5579..5bace66c5 100644
--- a/unsupported/test/cxx11_tensor_contract_sycl.cpp
+++ b/unsupported/test/cxx11_tensor_contract_sycl.cpp
@@ -254,26 +254,26 @@ void test_sycl_contraction_sizes(const Device& sycl_device) {
 template <typename Dev_selector> void tensorContractionPerDevice(Dev_selector& s){
   QueueInterface queueInterface(s);
   auto sycl_device=Eigen::SyclDevice(&queueInterface);
-  test_sycl_contraction<ColMajor, float,ptrdiff_t>(sycl_device, 32, 32, 32);
-  test_sycl_contraction<RowMajor,float,ptrdiff_t>(sycl_device, 32, 32, 32);
-  test_scalar<ColMajor,float,ptrdiff_t>(sycl_device, 32, 32, 32);
-  test_scalar<RowMajor,float,ptrdiff_t>(sycl_device, 32, 32, 32);
+  test_sycl_contraction<ColMajor, float,int64_t>(sycl_device, 32, 32, 32);
+  test_sycl_contraction<RowMajor,float,int64_t>(sycl_device, 32, 32, 32);
+  test_scalar<ColMajor,float,int64_t>(sycl_device, 32, 32, 32);
+  test_scalar<RowMajor,float,int64_t>(sycl_device, 32, 32, 32);
   std::chrono::time_point<std::chrono::system_clock> start, end;
   start = std::chrono::system_clock::now();
-  test_sycl_contraction<ColMajor,float,ptrdiff_t>(sycl_device, 128, 128, 128);
-  test_sycl_contraction<RowMajor,float,ptrdiff_t>(sycl_device, 128, 128, 128);
-  test_scalar<ColMajor,float,ptrdiff_t>(sycl_device, 128, 128, 128);
-  test_scalar<RowMajor,float,ptrdiff_t>(sycl_device, 128, 128, 128);
-  test_sycl_contraction_m<ColMajor, float, ptrdiff_t>(sycl_device);
-  test_sycl_contraction_m<RowMajor, float, ptrdiff_t>(sycl_device);
-  test_sycl_contraction_n<ColMajor, float, ptrdiff_t>(sycl_device);
-  test_sycl_contraction_n<RowMajor, float, ptrdiff_t>(sycl_device);
-  test_sycl_contraction_k<ColMajor, float, ptrdiff_t>(sycl_device);
-  test_sycl_contraction_k<RowMajor, float, ptrdiff_t>(sycl_device);
-  test_sycl_contraction_sizes<ColMajor, float, ptrdiff_t>(sycl_device);
-  test_sycl_contraction_sizes<RowMajor, float, ptrdiff_t>(sycl_device);
-  test_TF<RowMajor, float, ptrdiff_t>(sycl_device);
-  test_TF<ColMajor, float, ptrdiff_t>(sycl_device);
+  test_sycl_contraction<ColMajor,float,int64_t>(sycl_device, 128, 128, 128);
+  test_sycl_contraction<RowMajor,float,int64_t>(sycl_device, 128, 128, 128);
+  test_scalar<ColMajor,float,int64_t>(sycl_device, 128, 128, 128);
+  test_scalar<RowMajor,float,int64_t>(sycl_device, 128, 128, 128);
+  test_sycl_contraction_m<ColMajor, float, int64_t>(sycl_device);
+  test_sycl_contraction_m<RowMajor, float, int64_t>(sycl_device);
+  test_sycl_contraction_n<ColMajor, float, int64_t>(sycl_device);
+  test_sycl_contraction_n<RowMajor, float, int64_t>(sycl_device);
+  test_sycl_contraction_k<ColMajor, float, int64_t>(sycl_device);
+  test_sycl_contraction_k<RowMajor, float, int64_t>(sycl_device);
+  test_sycl_contraction_sizes<ColMajor, float, int64_t>(sycl_device);
+  test_sycl_contraction_sizes<RowMajor, float, int64_t>(sycl_device);
+  test_TF<RowMajor, float, int64_t>(sycl_device);
+  test_TF<ColMajor, float, int64_t>(sycl_device);
 
   end = std::chrono::system_clock::now();
   std::chrono::duration<double> elapsed_seconds = end-start;