diff --git a/test/m_epics_ca_test.cxx b/test/m_epics_ca_test.cxx
index 2e135ae..d5d4008 100644
--- a/test/m_epics_ca_test.cxx
+++ b/test/m_epics_ca_test.cxx
@@ -44,13 +44,14 @@ class IocProcess {
         _pid = fork();
 
         if (_pid == 0) {
+            int devnull = open("/dev/null", O_RDWR);
 
-            // Hide IOC output
-            int devnull = open("/dev/null", O_WRONLY);
+            dup2(devnull, STDIN_FILENO);
             dup2(devnull, STDOUT_FILENO);
+            dup2(devnull, STDERR_FILENO);
+
             close(devnull);
 
-            // Start the IOC from the child process
             execl(path.c_str(), path.c_str(), (char *)NULL);
             perror("execl failed");
             _exit(1);