diff --git a/SuperBuild/CMake/External_proj.cmake b/SuperBuild/CMake/External_proj.cmake
index dc014e321a2d7ed19ea2aa4b690d354891ad5672..d44c76b5cdb078be739cc86990d057cc04dbbabf 100644
--- a/SuperBuild/CMake/External_proj.cmake
+++ b/SuperBuild/CMake/External_proj.cmake
@@ -28,7 +28,7 @@ ADDTO_DEPENDENCIES_IF_NOT_SYSTEM(PROJ SQLITE)
 ExternalProject_Add(PROJ
   DEPENDS ${PROJ_DEPENDENCIES}
   PREFIX PROJ
-  URL "http://download.osgeo.org/proj/proj-6.2.1.tar.gz"
+  URL "http://download.osgeo.org/proj/proj-6.2.1.tar.gz"  # If we update PROJ to v7+, check option PROJ_TESTS!
   URL_MD5 9f874e227d221daf95f7858dc55dfa3e
   BINARY_DIR ${PROJ_SB_SRC}
   INSTALL_DIR ${SB_INSTALL_PREFIX}
@@ -40,6 +40,7 @@ ExternalProject_Add(PROJ
   -DBUILD_FRAMEWORKS_AND_BUNDLE:BOOL=FALSE
   -DPROJ_LIB_SUBDIR:STRING=lib
   -DPROJ_INCLUDE_SUBDIR:STRING=include
+  -DPROJ_TESTS:BOOL=OFF  # Starting with PROJ 7.0, the PROJ_TESTS option has been renamed into BUILD_TESTING
   CMAKE_COMMAND ${SB_CMAKE_COMMAND}
   LOG_DOWNLOAD 1
   LOG_CONFIGURE 1