diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e71b5e26..4d5366fe 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -17,7 +17,7 @@ jobs:
 
     - name: Build and run
       run: |
-        cmake ./
+        cmake -DNO_STL=0 ./
         MSBuild etl.sln
 
   build-visual-studio-no-stl:
@@ -30,5 +30,5 @@ jobs:
 
     - name: Build and run
       run: |
-        cmake -DETL_NO_STL=1 ./
+        cmake -DNO_STL=1 ./
         MSBuild etl.sln
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 06121a05..a948bccd 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -3,6 +3,10 @@ project(etl_unit_tests)
 
 add_definitions(-DETL_DEBUG)
 
+if (NO_STL EQUAL 1)
+	add_definitions(-DETL_NO_STL)
+endif()
+
 if(NOT UnitTest++_FOUND)
   # Add unittest-cpp as an ExternalProject
   include(cmake/unit-test_external_project.cmake)