diff --git a/module_build_service/builder/KojiContentGenerator.py b/module_build_service/builder/KojiContentGenerator.py
index 28f45034..6e9c6c84 100644
--- a/module_build_service/builder/KojiContentGenerator.py
+++ b/module_build_service/builder/KojiContentGenerator.py
@@ -407,11 +407,12 @@ class KojiContentGenerator(object):
         mmd_path = os.path.join(output_path, mmd_filename)
         try:
             with open(mmd_path, 'rb') as mmd_f:
-                data = to_text_type(mmd_f.read())
+                raw_data = mmd_f.read()
+                data = to_text_type(raw_data)
                 mmd = Modulemd.Module().new_from_string(data)
                 ret['filename'] = mmd_filename
-                ret['filesize'] = len(data)
-                ret['checksum'] = hashlib.md5(data.encode('utf-8')).hexdigest()
+                ret['filesize'] = len(raw_data)
+                ret['checksum'] = hashlib.md5(raw_data).hexdigest()
         except IOError:
             if arch == "src":
                 # This might happen in case the Module is submitted directly
diff --git a/tests/test_content_generator.py b/tests/test_content_generator.py
index 63d1e10e..2d5d2bd9 100644
--- a/tests/test_content_generator.py
+++ b/tests/test_content_generator.py
@@ -276,7 +276,7 @@ class TestBuild:
     @patch("module_build_service.builder.KojiContentGenerator.open", create=True)
     def test_get_arch_mmd_output(self, patched_open):
         patched_open.return_value = mock_open(
-            read_data=self.cg.mmd).return_value
+            read_data=self.cg.mmd.encode("utf-8")).return_value
         ret = self.cg._get_arch_mmd_output("./fake-dir", "x86_64")
         assert ret == {
             'arch': 'x86_64',
@@ -286,7 +286,7 @@ class TestBuild:
             'components': [],
             'extra': {'typeinfo': {'module': {}}},
             'filename': 'modulemd.x86_64.txt',
-            'filesize': 1136,
+            'filesize': 1138,
             'type': 'file'
         }
 
@@ -296,7 +296,7 @@ class TestBuild:
         rpm_artifacts = mmd.get_rpm_artifacts()
         rpm_artifacts.add("dhcp-libs-12:4.3.5-5.module_2118aef6.x86_64")
         mmd.set_rpm_artifacts(rpm_artifacts)
-        mmd_data = to_text_type(mmd.dumps())
+        mmd_data = bytes(mmd.dumps())
 
         patched_open.return_value = mock_open(
             read_data=mmd_data).return_value
@@ -336,7 +336,7 @@ class TestBuild:
                             u'version': '4.3.5'}],
             'extra': {'typeinfo': {'module': {}}},
             'filename': 'modulemd.x86_64.txt',
-            'filesize': 317,
+            'filesize': 319,
             'type': 'file'
         }
 
diff --git a/tests/test_get_generator_json_expected_output.json b/tests/test_get_generator_json_expected_output.json
index 07825958..37308aad 100644
--- a/tests/test_get_generator_json_expected_output.json
+++ b/tests/test_get_generator_json_expected_output.json
@@ -625,7 +625,7 @@
                 }
             ],
             "arch": "noarch",
-            "filesize": 1136,
+            "filesize": 1138,
             "checksum": "96b7739ffa3918e6ac3e3bd422b064ea",
             "checksum_type": "md5",
             "type": "file",
diff --git a/tests/test_get_generator_json_expected_output_with_log.json b/tests/test_get_generator_json_expected_output_with_log.json
index 01a3727d..1aa3a508 100644
--- a/tests/test_get_generator_json_expected_output_with_log.json
+++ b/tests/test_get_generator_json_expected_output_with_log.json
@@ -625,7 +625,7 @@
                 }
             ],
             "arch": "noarch",
-            "filesize": 1136,
+            "filesize": 1138,
             "checksum": "96b7739ffa3918e6ac3e3bd422b064ea",
             "checksum_type": "md5",
             "type": "file",