diff --git a/unittest/CMakeLists.txt b/unittest/CMakeLists.txt
index 430fc3579b0b924f9eafcd7e5c9260dbfc661d7a..c5c555a3a3c03bc64547eeebc17e4e3088c4f483 100644
--- a/unittest/CMakeLists.txt
+++ b/unittest/CMakeLists.txt
@@ -31,6 +31,9 @@ endmacro(ADD_LIB_UNIT_TEST)
 add_lib_unit_test(matrix)
 if(EIGENPY_WITH_TENSOR_SUPPORT)
   add_lib_unit_test(tensor)
+  if(NOT DEFINED CMAKE_CXX_STANDARD)
+    set_target_properties(tensor PROPERTIES CXX_STANDARD 11)
+  endif()
 endif()
 add_lib_unit_test(geometry)
 add_lib_unit_test(complex)