diff --git a/development/autotests/ExportTests.cmake b/development/autotests/ExportTests.cmake
index 3aa57677da..3b520585e7 100644
--- a/development/autotests/ExportTests.cmake
+++ b/development/autotests/ExportTests.cmake
@@ -98,9 +98,15 @@ macro(findexpr found testname listname rsublabel)
       # remove doubles in sublabel
       list(REMOVE_DUPLICATES tmpsublabel)
     else()
-      set(_itr "^${_itrx}$")
+      if (_itrx MATCHES "^!\(.*\)$")
+        set(_itr "^${CMAKE_MATCH_1}$")
+        set(_foundval 0)
+      else()
+        set(_itr "^${_itrx}$")
+        set(_foundval 1)
+      endif()
       if (${testname} MATCHES "${_itr}")
-        set(_found 1)
+        set(_found ${_foundval})
         break()
       endif()
     endif()