diff --git a/pytorch3d/implicitron/tools/vis_utils.py b/pytorch3d/implicitron/tools/vis_utils.py
index be5eb9d9..1b3b1f15 100644
--- a/pytorch3d/implicitron/tools/vis_utils.py
+++ b/pytorch3d/implicitron/tools/vis_utils.py
@@ -128,8 +128,8 @@ def visualize_basics(
     # TODO: handle errors on the outside
     try:
         imout = {"all": torch.cat(list(imout.values()), dim=2)}
-    except:
-        print("cant cat!")
+    except RuntimeError as e:
+        print("cant cat!", e.args)
 
     for k, v in imout.items():
         viz.images(
diff --git a/tests/test_render_meshes.py b/tests/test_render_meshes.py
index 415b3b1b..f6b91a93 100644
--- a/tests/test_render_meshes.py
+++ b/tests/test_render_meshes.py
@@ -1412,7 +1412,10 @@ class TestRenderMeshes(TestCaseMixin, unittest.TestCase):
             images = renderer(sphere_mesh)
             rgb = images[0, ..., :3].squeeze().cpu()
 
-            filename = f"test_simple_sphere_outside_zfar_{int(zfar)}_{rasterizer_type.__name__}.png"
+            filename = (
+                "test_simple_sphere_outside_zfar_"
+                f"{int(zfar)}_{rasterizer_type.__name__}.png"
+            )
 
             # Load reference image
             image_ref = load_rgb_image(filename, DATA_DIR)