diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6f027cb44..8eee0a0eb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -294,7 +294,11 @@ add_subdirectory(unsupported)
 
 add_subdirectory(demos EXCLUDE_FROM_ALL)
 
-add_subdirectory(blas EXCLUDE_FROM_ALL)
+if(EIGEN_LEAVE_TEST_IN_ALL_TARGET)
+  add_subdirectory(blas)
+else()
+  add_subdirectory(blas EXCLUDE_FROM_ALL)
+endif()
 
 # must be after test and unsupported, for configuring buildtests.in
 add_subdirectory(scripts EXCLUDE_FROM_ALL)
diff --git a/blas/CMakeLists.txt b/blas/CMakeLists.txt
index 8c6792ad1..c8d5c241f 100644
--- a/blas/CMakeLists.txt
+++ b/blas/CMakeLists.txt
@@ -38,5 +38,10 @@ install(TARGETS eigen_blas
         ARCHIVE DESTINATION lib)
 
 
+if(EIGEN_LEAVE_TEST_IN_ALL_TARGET)
+  add_subdirectory(testing) # can't do EXCLUDE_FROM_ALL here, breaks CTest
+else()
   add_subdirectory(testing)
+endif()
+
 endif(CMAKE_Fortran_COMPILER_WORKS)