diff --git a/roles/mail_server/molecule/default/tests/test_default.py b/roles/mail_server/molecule/default/tests/test_default.py
index ce8e4b055da0abd4e59e470ae3cd279d5d7f0d6f..c7774ed477724fe5f8f291a5d4a869539ebc9488 100644
--- a/roles/mail_server/molecule/default/tests/test_default.py
+++ b/roles/mail_server/molecule/default/tests/test_default.py
@@ -113,14 +113,14 @@ def test_ldap_tls_truststore_file(host):
     assert tls_file.user == 'root'
     assert tls_file.group == 'root'
     assert tls_file.mode == 0o644
-    assert tls_file.content == open("tests/data/x509/ca.cert.pem", "r").read().rstrip()
+    assert tls_file.content_string == open("tests/data/x509/ca.cert.pem", "r").read().rstrip()
 
     tls_file = host.file('/var/spool/postfix/etc/ssl/certs/mail_ldap_tls_truststore.pem')
     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/ca.cert.pem", "r").read().rstrip()
+    assert tls_file.content_string == open("tests/data/x509/ca.cert.pem", "r").read().rstrip()
 
 
 def test_mailname_file(host):
@@ -243,7 +243,7 @@ def test_postfix_delivery_to_dovecot(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_system_authentication_is_disabled(host):
@@ -253,7 +253,7 @@ def test_dovecot_system_authentication_is_disabled(host):
 
     config = host.file("/etc/dovecot/conf.d/10-auth.conf")
 
-    assert "!include auth-system.conf.ext" not in config.content
+    assert "!include auth-system.conf.ext" not in config.content_string
 
 
 def test_dovecot_overrides_configuration_file(host):