diff --git a/unsupported/test/CMakeLists.txt b/unsupported/test/CMakeLists.txt
index c9a70d7a7..438c53118 100644
--- a/unsupported/test/CMakeLists.txt
+++ b/unsupported/test/CMakeLists.txt
@@ -191,10 +191,12 @@ if(CUDA_FOUND AND EIGEN_TEST_CUDA)
   # Make sure to compile without the -pedantic, -Wundef, -Wnon-virtual-dtor
   # and -fno-check-new flags since they trigger thousands of compilation warnings
   # in the CUDA runtime
+  # Also remove -ansi that is incompatible with std=c++11.
   string(REPLACE "-pedantic" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
   string(REPLACE "-Wundef" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
   string(REPLACE "-Wnon-virtual-dtor" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
   string(REPLACE "-fno-check-new" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+  string(REPLACE "-ansi" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
 
   message(STATUS "Flags used to compile cuda code: " ${CMAKE_CXX_FLAGS})
 
@@ -210,7 +212,14 @@ if(CUDA_FOUND AND EIGEN_TEST_CUDA)
     set(EIGEN_CUDA_RELAXED_CONSTEXPR "--relaxed-constexpr")
   endif()
 
-  set(CUDA_NVCC_FLAGS "-std=c++11 ${EIGEN_CUDA_RELAXED_CONSTEXPR} -arch compute_${EIGEN_CUDA_COMPUTE_ARCH} -Xcudafe \"--display_error_number\"")
+  if(NOT EIGEN_TEST_CXX11)
+    set(EIGEN_CUDA_CXX11_FLAG "-std=c++11")
+  else()
+    # otherwise the flag has already been added because of the above set(CMAKE_CXX_STANDARD 11)
+    set(EIGEN_CUDA_CXX11_FLAG "")
+  endif()
+
+  set(CUDA_NVCC_FLAGS  "${EIGEN_CUDA_CXX11_FLAG} ${EIGEN_CUDA_RELAXED_CONSTEXPR} -arch compute_${EIGEN_CUDA_COMPUTE_ARCH} -Xcudafe \"--display_error_number\" ${CUDA_NVCC_FLAGS}")
   cuda_include_directories("${CMAKE_CURRENT_BINARY_DIR}" "${CUDA_TOOLKIT_ROOT_DIR}/include")
   set(EIGEN_ADD_TEST_FILENAME_EXTENSION "cu")