diff --git a/Tests/CMakeLists.txt b/Tests/CMakeLists.txt
index faaa17732..d872fa7a3 100644
--- a/Tests/CMakeLists.txt
+++ b/Tests/CMakeLists.txt
@@ -792,11 +792,8 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=master -P ${CMake_SOURCE_DIR}/Utilities/
     --test-command ${CMAKE_CTEST_COMMAND} -V
     )
   LIST(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/ExternalProject")
-  # The ExternalProject test takes 900 seconds on some machines!
-  GET_TEST_PROPERTY(ExternalProject TIMEOUT PREVIOUS_TIMEOUT)
-  IF("${PREVIOUS_TIMEOUT}" MATCHES NOTFOUND)
-    SET_TESTS_PROPERTIES(ExternalProject PROPERTIES TIMEOUT 1000)
-  ENDIF("${PREVIOUS_TIMEOUT}" MATCHES NOTFOUND)
+  SET_TESTS_PROPERTIES(ExternalProject PROPERTIES
+    TIMEOUT ${CMAKE_LONG_TEST_TIMEOUT})
 
   # do each of the tutorial steps
   FOREACH(STP RANGE 1 7)