diff --git a/roles/mail_server/molecule/default/tests/test_optional.py b/roles/mail_server/molecule/default/tests/test_optional.py
index 8bae2d776333810bd2559ebedddc32829cf7ea54..c8079027080cd50e5b6c11e5f44a1836093679b8 100644
--- a/roles/mail_server/molecule/default/tests/test_optional.py
+++ b/roles/mail_server/molecule/default/tests/test_optional.py
@@ -24,28 +24,28 @@ def test_smtp_tls_files(host):
         assert tls_file.user == 'root'
         assert tls_file.group == 'root'
         assert tls_file.mode == 0o640
-        assert tls_file.content == open("tests/data/x509/parameters-optional_smtp.key.pem", "r").read().rstrip()
+        assert tls_file.content_string == open("tests/data/x509/parameters-optional_smtp.key.pem", "r").read().rstrip()
 
         tls_file = host.file('/etc/ssl/certs/%s_smtp.pem' % hostname)
         assert tls_file.is_file
         assert tls_file.user == 'root'
         assert tls_file.group == 'root'
         assert tls_file.mode == 0o644
-        assert tls_file.content == open("tests/data/x509/parameters-optional_smtp.cert.pem", "r").read().rstrip()
+        assert tls_file.content_string == open("tests/data/x509/parameters-optional_smtp.cert.pem", "r").read().rstrip()
 
         tls_file = host.file('/etc/ssl/private/%s_imap.key' % hostname)
         assert tls_file.is_file
         assert tls_file.user == 'root'
         assert tls_file.group == 'root'
         assert tls_file.mode == 0o640
-        assert tls_file.content == open("tests/data/x509/parameters-optional_imap.key.pem", "r").read().rstrip()
+        assert tls_file.content_string == open("tests/data/x509/parameters-optional_imap.key.pem", "r").read().rstrip()
 
         tls_file = host.file('/etc/ssl/certs/%s_imap.pem' % hostname)
         assert tls_file.is_file
         assert tls_file.user == 'root'
         assert tls_file.group == 'root'
         assert tls_file.mode == 0o644
-        assert tls_file.content == open("tests/data/x509/parameters-optional_imap.cert.pem", "r").read().rstrip()
+        assert tls_file.content_string == open("tests/data/x509/parameters-optional_imap.cert.pem", "r").read().rstrip()
 
 
 def test_certificate_validity_check_configuration(host):
@@ -61,14 +61,14 @@ def test_certificate_validity_check_configuration(host):
     assert config.user == 'root'
     assert config.group == 'root'
     assert config.mode == 0o644
-    assert config.content == "/etc/ssl/certs/%s_smtp.pem" % hostname
+    assert config.content_string == "/etc/ssl/certs/%s_smtp.pem" % hostname
 
     config = host.file('/etc/check_certificate/%s_imap.conf' % hostname)
     assert config.is_file
     assert config.user == 'root'
     assert config.group == 'root'
     assert config.mode == 0o644
-    assert config.content == "/etc/ssl/certs/%s_imap.pem" % hostname
+    assert config.content_string == "/etc/ssl/certs/%s_imap.pem" % hostname
 
 
 def test_mailname_file_content(host):
@@ -79,7 +79,7 @@ def test_mailname_file_content(host):
     mailname = host.file('/etc/mailname')
     hostname = host.run('hostname').stdout.strip()
 
-    assert mailname.content == hostname
+    assert mailname.content_string == hostname
 
 
 def test_postfix_main_cf_file_content(host):
@@ -92,7 +92,7 @@ def test_postfix_main_cf_file_content(host):
     hostname = host.run('hostname').stdout.strip()
 
     config = host.file('/etc/postfix/main.cf')
-    config_lines = config.content.split("\n")
+    config_lines = config.content_string.split("\n")
 
     assert "myhostname = %s" % hostname in config_lines
     assert "mydestination = %s, %s, localhost.localdomain, localhost" % (hostname, hostname) in config_lines
@@ -118,7 +118,7 @@ def test_local_aliases(host):
     with host.sudo():
         mail_log = host.file('/var/log/mail.log')
         pattern = r"dovecot: lda\(john.doe@domain1\): msgid=<%s>: saved mail to INBOX" % message_id
-        assert re.search(pattern, mail_log.content) is not None
+        assert re.search(pattern, mail_log.content_string) is not None
 
 
 def test_dovecot_mailbox_directories(host):