diff --git a/roles/mail_server/molecule/default/tests/test_mandatory.py b/roles/mail_server/molecule/default/tests/test_mandatory.py
index 048fba86a4fef7305ca352d4bdff2201983ecdde..6feec89f0aa58111c94f6565cd7e699f3f4f1335 100644
--- a/roles/mail_server/molecule/default/tests/test_mandatory.py
+++ b/roles/mail_server/molecule/default/tests/test_mandatory.py
@@ -21,28 +21,28 @@ 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/%s_smtp.key" % hostname, "r").read().rstrip()
+        assert tls_file.content_string == open("tests/data/x509/%s_smtp.key" % hostname, "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/%s_smtp.pem" % hostname, "r").read().rstrip()
+        assert tls_file.content_string == open("tests/data/x509/%s_smtp.pem" % hostname, "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/%s_imap.key" % hostname, "r").read().rstrip()
+        assert tls_file.content_string == open("tests/data/x509/%s_imap.key" % hostname, "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/%s_imap.pem" % hostname, "r").read().rstrip()
+        assert tls_file.content_string == open("tests/data/x509/%s_imap.pem" % hostname, "r").read().rstrip()
 
 
 def test_certificate_validity_check_configuration(host):
@@ -58,14 +58,14 @@ 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):
@@ -76,7 +76,7 @@ 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):
@@ -87,7 +87,7 @@ 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