diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 36b86ee..73749d0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,7 +35,7 @@ jobs:
         run: |
           sudo apt-get install lua5.1
           make check-scripts
-          make test
+          make TREAT_WARNINGS_AS_ERRORS=true test
 
   linux-mono:
     name: Linux (mono)
@@ -59,7 +59,7 @@ jobs:
       - name: Check Mod
         run: |
           # check-scripts does not depend on .net/mono, so is not needed here
-          make RUNTIME=mono test
+          make RUNTIME=mono TREAT_WARNINGS_AS_ERRORS=true test
 
   windows:
     name: Windows (.NET 6.0)
@@ -85,5 +85,6 @@ jobs:
         run: |
           choco install lua --version 5.1.5.52
           $ENV:Path = $ENV:Path + ";C:\Program Files (x86)\Lua\5.1\"
+          $ENV:TREAT_WARNINGS_AS_ERRORS = "true"
           .\make.ps1 check-scripts
           .\make.ps1 test
diff --git a/Makefile b/Makefile
index 3d552b5..9452a97 100644
--- a/Makefile
+++ b/Makefile
@@ -22,7 +22,7 @@
 #   make [RUNTIME=net6] check
 #
 # to check your mod yaml for errors, run:
-#   make [RUNTIME=net6] test
+#   make [RUNTIME=net6] [TREAT_WARNINGS_AS_ERRORS=false] test
 #
 # the following are internal sdk helpers that are not intended to be run directly:
 #   make check-variables