diff --git a/Tests/CMakeLists.txt b/Tests/CMakeLists.txt
index 14f651500..2eaaa8fb5 100644
--- a/Tests/CMakeLists.txt
+++ b/Tests/CMakeLists.txt
@@ -60,7 +60,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=CVS -P ${CMake_SOURCE_DIR}/Utilities/Rel
     ADD_TEST(NightlyCMakeBuild 
       /bin/sh ${CMake_BINARY_DIR}/Tests/CMake-CVS/nightly-cmake.sh)
     IF(COMMAND SET_TESTS_PROPERTIES AND COMMAND GET_TEST_PROPERTY)
-      SET_TESTS_PROPERTIES ( NightlyCMakeBuild PROPERTIES TIMEOUT 1800)
+      SET_TESTS_PROPERTIES ( NightlyCMakeBuild PROPERTIES TIMEOUT 2500)
     ENDIF(COMMAND SET_TESTS_PROPERTIES AND COMMAND GET_TEST_PROPERTY)
   ENDIF(CMAKE_BUILD_NIGHTLY_WINDOWS_TEST)