diff --git a/python/test/asset_test.py b/python/test/asset_test.py
index 8d2a31e76..f29992511 100644
--- a/python/test/asset_test.py
+++ b/python/test/asset_test.py
@@ -440,6 +440,15 @@ def test_str(self):
             "test_0_1_refvideo_720x480_vs_disvideo_720x480_ebd_8_yuv420p10le_q_720x480"
         )
 
+        asset = Asset(dataset="test", content_id=0, asset_id=1,
+                      ref_path="dir/refvideo.yuv", dis_path="dir/disvideo.yuv",
+                      asset_dict={'width': 720, 'height': 480,
+                                  'workfile_yuv_type': 'yuv420p10le'})
+        self.assertEqual(
+            str(asset),
+            "test_0_1_refvideo_720x480_vs_disvideo_720x480_q_720x480_wf_yuv420p10le"
+        )
+
     def test_hash_equal(self):
         asset1 = Asset(dataset="test", content_id=0, asset_id=2,
                       ref_path="dir/refvideo.yuv", dis_path="dir/disvideo.yuv",
diff --git a/python/vmaf/core/asset.py b/python/vmaf/core/asset.py
index d7e40a3d0..2469bf1c7 100644
--- a/python/vmaf/core/asset.py
+++ b/python/vmaf/core/asset.py
@@ -528,6 +528,11 @@ def quality_str(self):
                 s += "_"
             s += "{w}x{h}".format(w=w, h=h)
 
+        if self.workfile_yuv_type != self.DEFAULT_YUV_TYPE:
+            if s != "":
+                s += "_"
+            s += "wf_" + self.workfile_yuv_type
+
         return s
 
     def to_string(self):