diff --git a/development/autotests/single-test.cmake b/development/autotests/single-test.cmake
index d09bc5afa7..e14e3bf647 100755
--- a/development/autotests/single-test.cmake
+++ b/development/autotests/single-test.cmake
@@ -47,6 +47,7 @@ endif()
 
 set(LYX_EXE "${BINDIR}/${LYX}")
 set(XVKBD_EXE "${BINDIR}/xvkbd")
+set(ENV{XVKBD_HACKED} "1")
 
 # Environments needed by keytest.py
 set(ENV{PACKAGE} ${PACKAGE})