diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6bf75788..6ae98c20 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1103,7 +1103,7 @@ if (NOT EVENT__DISABLE_TESTS)
                 DEPENDS
                     event_rpcgen.py
                     test/regress.rpc
-                COMMAND ${PYTHON_EXECUTABLE} ../event_rpcgen.py regress.rpc
+                COMMAND ${PYTHON_EXECUTABLE} ../event_rpcgen.py --quiet regress.rpc
                 WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/test)
 
             list(APPEND SRC_REGRESS