diff --git a/appveyor.yml b/appveyor.yml
index b023e6224..70e66818d 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -4,6 +4,8 @@ platform: Any CPU
 image: Visual Studio 2017
 install:
 - git submodule update --init --recursive
+# force update ILSpy-tests to the latest ref
+- git submodule update --remote ILSpy-tests
 before_build:
 - nuget restore ILSpy.sln
 build_script:
diff --git a/debugbuild.bat b/debugbuild.bat
index 0b90e3243..2c3c921a4 100644
--- a/debugbuild.bat
+++ b/debugbuild.bat
@@ -1,5 +1,6 @@
 @if not exist "cecil\Mono.Cecil.csproj" (
 	git submodule update --init || exit /b 1
+	git submodule update --remote ILSpy-tests || exit /b 1
 )
 @setlocal enabledelayedexpansion
 @set MSBUILD=