diff --git a/roles/mail_server/molecule/default/tests/test_default.py b/roles/mail_server/molecule/default/tests/test_default.py
index feee441b137226907dc6f61f16dc70cb3f16b20d..62017eb87d2569ebb20eb000a10901367cc2407f 100644
--- a/roles/mail_server/molecule/default/tests/test_default.py
+++ b/roles/mail_server/molecule/default/tests/test_default.py
@@ -1,5 +1,6 @@
 import os
 import re
+import time
 import uuid
 
 import defusedxml.ElementTree as ElementTree
@@ -258,6 +259,9 @@ def test_postfix_delivery_to_dovecot(host):
     send = host.run('swaks --header %s --suppress-data --to john.doe@domain1 --server %s', "Message-Id: <%s>" % message_id, hostname)
     assert send.rc == 0
 
+    # Wait for a little while for message to be processed.
+    time.sleep(5)
+
     with host.sudo():
         mail_log = host.file('/var/log/mail.log')
         pattern = r"dovecot: lda\(john.doe@domain1\)<\d+><.+?>: msgid=<%s>: saved mail to INBOX" % message_id
@@ -534,6 +538,9 @@ def test_postfix_local_delivery(host):
     send = host.run('swaks --header %s --suppress-data --to localuser@localhost --server localhost', "Message-Id: <%s>" % message_id)
     assert send.rc == 0
 
+    # Wait for a little while for message to be processed.
+    time.sleep(5)
+
     with host.sudo():
         mail_log = host.file('/var/log/mail.log')
 
@@ -562,6 +569,9 @@ def test_postfix_sends_mails_without_tls_when_unavailable(host):
     send = host.run('swaks --header %s --suppress-data --to root@smtp-server-refusing-tls --server localhost', "Message-Id: <%s>" % message_id)
     assert send.rc == 0
 
+    # Wait for a little while for message to be processed.
+    time.sleep(5)
+
     with host.sudo():
         mail_log = host.file('/var/log/mail.log')
 
@@ -590,6 +600,9 @@ def test_postfix_sends_mails_over_tls_when_available(host):
     send = host.run('swaks --tls --header %s --suppress-data --to root@smtp-server-requiring-tls --server localhost', "Message-Id: <%s>" % message_id)
     assert send.rc == 0
 
+    # Wait for a little while for message to be processed.
+    time.sleep(5)
+
     with host.sudo():
         mail_log = host.file('/var/log/mail.log')
 
diff --git a/roles/mail_server/molecule/default/tests/test_optional.py b/roles/mail_server/molecule/default/tests/test_optional.py
index 8f7aefba2b32b15ea5deee6317cfc064bf97e20c..36e2728619eecc877e6f55a3f514fb314ad19488 100644
--- a/roles/mail_server/molecule/default/tests/test_optional.py
+++ b/roles/mail_server/molecule/default/tests/test_optional.py
@@ -57,9 +57,11 @@ def test_local_aliases(host):
     message_id = "%s@localhost" % str(uuid.uuid4())
 
     send = host.run('swaks --header %s --suppress-data --to root@localhost', "Message-Id: <%s>" % message_id)
-    time.sleep(1)
     assert send.rc == 0
 
+    # Wait for a little while for message to be processed.
+    time.sleep(5)
+
     with host.sudo():
         mail_log = host.file('/var/log/mail.log')
         pattern = r"dovecot: lda\(john.doe@domain1\)<\d+><.+?>: msgid=<%s>: saved mail to INBOX" % message_id