diff --git a/tests/p_postfix/0-install_postfix.sh b/tests/p_postfix/0-install_postfix.sh
index 0e8b7ff..9edb4a7 100755
--- a/tests/p_postfix/0-install_postfix.sh
+++ b/tests/p_postfix/0-install_postfix.sh
@@ -4,6 +4,7 @@
 # Remove other MTAs
 t_ServiceControl sendmail stop
 t_ServiceControl exim stop
+sleep 3
 t_RemovePackage sendmail
 t_RemovePackage exim
 
diff --git a/tests/p_sendmail/0-install_sendmail.sh b/tests/p_sendmail/0-install_sendmail.sh
index 2d3d71c..96b9ca3 100755
--- a/tests/p_sendmail/0-install_sendmail.sh
+++ b/tests/p_sendmail/0-install_sendmail.sh
@@ -5,7 +5,9 @@ t_InstallPackage sendmail
 
 # Remove other MTAs
 t_ServiceControl postfix stop
+t_ServiceControl exim stop
 sleep 3
 t_RemovePackage postfix
+t_RemovePackage exim
 
 t_ServiceControl sendmail start