diff --git a/roles/backup_client/molecule/default/tests/test_parameters_optional.py b/roles/backup_client/molecule/default/tests/test_parameters_optional.py
index ff1f54f7418d5faa66a02eb48894ff5a0c59965e..478d845b80c12b708870ba97a6dc24b816b6ec89 100644
--- a/roles/backup_client/molecule/default/tests/test_parameters_optional.py
+++ b/roles/backup_client/molecule/default/tests/test_parameters_optional.py
@@ -16,7 +16,7 @@ def test_gnupg_private_keys_file_content(host):
     with host.sudo():
         gnupg_private_keys = host.file('/etc/duply/main/private_keys.asc')
 
-        assert gnupg_private_keys.content == open('tests/data/gnupg/parameters-optional.asc', 'r').read().strip()
+        assert gnupg_private_keys.content_string == open('tests/data/gnupg/parameters-optional.asc', 'r').read().strip()
 
 
 def test_gnupg_public_keys_file_content(host):
@@ -27,9 +27,9 @@ def test_gnupg_public_keys_file_content(host):
     with host.sudo():
         gnupg_public_keys = host.file('/etc/duply/main/public_keys.asc')
 
-        assert open('tests/data/gnupg/additional_encryption_key_1.asc', 'r').read().strip() in gnupg_public_keys.content
-        assert open('tests/data/gnupg/additional_encryption_key_2.asc', 'r').read().strip() in gnupg_public_keys.content
-        assert open('tests/data/gnupg/additional_encryption_key_3.asc', 'r').read().strip() in gnupg_public_keys.content
+        assert open('tests/data/gnupg/additional_encryption_key_1.asc', 'r').read().strip() in gnupg_public_keys.content_string
+        assert open('tests/data/gnupg/additional_encryption_key_2.asc', 'r').read().strip() in gnupg_public_keys.content_string
+        assert open('tests/data/gnupg/additional_encryption_key_3.asc', 'r').read().strip() in gnupg_public_keys.content_string
 
 
 def test_backup_ssh_key_file_content(host):
@@ -41,7 +41,7 @@ def test_backup_ssh_key_file_content(host):
 
         ssh_key = host.file('/etc/duply/main/ssh/identity')
 
-        assert ssh_key.content == open('tests/data/ssh/parameters-optional', 'r').read().strip()
+        assert ssh_key.content_string == open('tests/data/ssh/parameters-optional', 'r').read().strip()
 
 
 def test_known_hosts_content(host):
@@ -53,7 +53,7 @@ def test_known_hosts_content(host):
 
         known_hosts = host.file('/etc/duply/main/ssh/known_hosts')
 
-        assert known_hosts.content == open('tests/data/ssh/parameters-optional-known_hosts', 'r').read()
+        assert known_hosts.content_string == open('tests/data/ssh/parameters-optional-known_hosts', 'r').read()
 
 
 def test_duply_configuration_content(host):
@@ -65,11 +65,11 @@ def test_duply_configuration_content(host):
 
         duply_configuration = host.file('/etc/duply/main/conf')
 
-        assert "GPG_KEYS_ENC='C4B2AE9F7A4F400A,3093C91BC3A9444B,86816FD928063B3F,8A14CD6C71223B72'" in duply_configuration.content
-        assert "GPG_KEY_SIGN='C4B2AE9F7A4F400A'" in duply_configuration.content
-        assert "TARGET='pexpect+sftp://backupuser@10.31.127.10:3333//duplicity/parameters-optional-s64'" in duply_configuration.content
+        assert "GPG_KEYS_ENC='C4B2AE9F7A4F400A,3093C91BC3A9444B,86816FD928063B3F,8A14CD6C71223B72'" in duply_configuration.content_string
+        assert "GPG_KEY_SIGN='C4B2AE9F7A4F400A'" in duply_configuration.content_string
+        assert "TARGET='pexpect+sftp://backupuser@10.31.127.10:3333//duplicity/parameters-optional-s64'" in duply_configuration.content_string
         assert "DUPL_PARAMS=\"$DUPL_PARAMS --ssh-options='-oLogLevel=ERROR -oUserKnownHostsFile=/dev/null " \
-            "-oGlobalKnownHostsFile=/etc/duply/main/ssh/known_hosts -oIdentityFile=/etc/duply/main/ssh/identity'\"" in duply_configuration.content
+            "-oGlobalKnownHostsFile=/etc/duply/main/ssh/known_hosts -oIdentityFile=/etc/duply/main/ssh/identity'\"" in duply_configuration.content_string
 
 
 def test_duply_gnupg_keyring_private_keys(host):