diff --git a/.cmake/Modules/Cram.cmake b/.cmake/Modules/Cram.cmake
index cdc0ec4..8fc8778 100644
--- a/.cmake/Modules/Cram.cmake
+++ b/.cmake/Modules/Cram.cmake
@@ -30,7 +30,23 @@ set(ENV{CRITERION_NO_EARLY_EXIT} "1")
 set(ENV{CRITERION_JOBS} "1")
 set(ENV{CRITERION_DISABLE_TIME_MEASUREMENTS} "1")
 
-execute_process (COMMAND python -m cram -v "${CRAM_PATH}" TIMEOUT 60 RESULT_VARIABLE RES)
+if (WIN32)
+  if (NOT ENV{MINGW})
+    set (MINGW_HOME "C:/MinGW")
+  else ()
+    file (TO_CMAKE_PATH "$ENV{MINGW}" MINGW_HOME)
+  endif ()
+  if (NOT ENV{CRAM_SHELL} AND MINGW_HOME)
+    set (CRAM_SHELL "${MINGW_HOME}/msys/1.0/bin/sh.exe")
+  else ()
+    file (TO_CMAKE_PATH "$ENV{CRAM_SHELL}" CRAM_SHELL)
+  endif ()
+  if (CRAM_SHELL)
+    set(CRAM_OPTS "--shell=${CRAM_SHELL}")
+  endif ()
+endif ()
+
+execute_process (COMMAND python -m cram -v ${CRAM_OPTS} "${CRAM_PATH}" TIMEOUT 60 RESULT_VARIABLE RES)
 
 if (NOT RES STREQUAL "0")
   message (FATAL_ERROR "Cram tests failed")