diff --git a/pyproject.toml b/pyproject.toml
index 7d2a4dac..a4186784 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ filterwarnings = ["error"]
 testpaths = ["python/tests"]
 
 [tool.cibuildwheel]
-build-verbosity = 3
+build-verbosity = 0
 #manylinux-x86_64-image = "manylinux_2_28"
 environment = "CMAKE_ARGS_F=/tmp/cmake_args"
 
diff --git a/tests/test_units.cpp b/tests/test_units.cpp
index 63453439..b15f83a9 100644
--- a/tests/test_units.cpp
+++ b/tests/test_units.cpp
@@ -82,7 +82,7 @@ static char const* path() {
 static std::string config() {
     auto dir = path();
     if (!dir)
-        return {};
+        return "";
     return fmt::format(R"({{"version": "1.0", "directory": "{}"}})", dir);
 }
 
@@ -2280,8 +2280,8 @@ int main(int argc, char** argv) {
     auto srv_id = fork();
     if (srv_id == 0) {
         usleep(1); // TODO Any statement is required to be run for successful `execl` run...
-        std::string cli_args = fmt::format("--quiet --config {}", path());
-        execl(srv_path.c_str(), srv_path.c_str(), cli_args, (char*)(NULL));
+        std::string cli_args = "--quiet" + (path() ? fmt::format(" --config {}", path()) : "");
+        execl(srv_path.c_str(), srv_path.c_str(), cli_args.c_str(), (char*)(NULL));
         exit(0);
     }
     usleep(1000000); // 1 sec