diff --git a/CMakeLists.txt b/CMakeLists.txt
index 518731bb..1da4c616 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1285,13 +1285,13 @@ if (NOT EVENT__DISABLE_TESTS)
             set(TEST_NAME regress__${BACKEND_TEST_NAME})
 
             add_test(${TEST_NAME}
-                     ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/regress)
+                     ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/regress --quiet)
 
             set_tests_properties(${TEST_NAME}
                                  PROPERTIES ENVIRONMENT "${ENV_VARS}")
 
             add_test(${TEST_NAME}_debug
-                     ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/regress)
+                     ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/regress --quiet)
 
             set_tests_properties(${TEST_NAME}_debug
                                  PROPERTIES ENVIRONMENT "${ENV_VARS};EVENT_DEBUG_MODE=1")