diff --git a/tests/client/ayon_core/lib/test_transcoding.py b/tests/client/ayon_core/lib/test_transcoding.py
new file mode 100644
index 0000000000..f637e8bd9e
--- /dev/null
+++ b/tests/client/ayon_core/lib/test_transcoding.py
@@ -0,0 +1,135 @@
+import unittest
+
+from ayon_core.lib.transcoding import (
+    get_review_info_by_layer_name
+)
+
+
+class GetReviewInfoByLayerName(unittest.TestCase):
+    """Test responses from `get_review_info_by_layer_name`"""
+    def test_rgba_channels(self):
+
+        # RGB is supported
+        info = get_review_info_by_layer_name(["R", "G", "B"])
+        self.assertEqual(info, [{
+            "name": "",
+            "review_channels": {
+                "R": "R",
+                "G": "G",
+                "B": "B",
+                "A": None,
+            }
+        }])
+
+        # rgb is supported
+        info = get_review_info_by_layer_name(["r", "g", "b"])
+        self.assertEqual(info, [{
+            "name": "",
+            "review_channels": {
+                "R": "r",
+                "G": "g",
+                "B": "b",
+                "A": None,
+            }
+        }])
+
+        # diffuse.[RGB] is supported
+        info = get_review_info_by_layer_name(
+            ["diffuse.R", "diffuse.G", "diffuse.B"]
+        )
+        self.assertEqual(info, [{
+            "name": "diffuse",
+            "review_channels": {
+                "R": "diffuse.R",
+                "G": "diffuse.G",
+                "B": "diffuse.B",
+                "A": None,
+            }
+        }])
+
+        info = get_review_info_by_layer_name(["R", "G", "B", "A"])
+        self.assertEqual(info, [{
+            "name": "",
+            "review_channels": {
+                "R": "R",
+                "G": "G",
+                "B": "B",
+                "A": "A",
+            }
+        }])
+
+    def test_z_channel(self):
+
+        info = get_review_info_by_layer_name(["Z"])
+        self.assertEqual(info, [{
+            "name": "",
+            "review_channels": {
+                "R": "Z",
+                "G": "Z",
+                "B": "Z",
+                "A": None,
+            }
+        }])
+
+        info = get_review_info_by_layer_name(["Z", "A"])
+        self.assertEqual(info, [{
+            "name": "",
+            "review_channels": {
+                "R": "Z",
+                "G": "Z",
+                "B": "Z",
+                "A": "A",
+            }
+        }])
+
+
+    def test_unknown_channels(self):
+        info = get_review_info_by_layer_name(["hello", "world"])
+        self.assertEqual(info, [])
+
+    def test_rgba_priority(self):
+        """Ensure main layer, and RGB channels are prioritized
+
+        If both Z and RGB channels are present for a layer name, then RGB
+        should be prioritized and the Z channel should be ignored.
+
+        Also, the alpha channel from another "layer name" is not used. Note
+        how the diffuse response does not take A channel from the main layer.
+
+        """
+
+        info = get_review_info_by_layer_name([
+            "Z",
+            "diffuse.R", "diffuse.G", "diffuse.B",
+            "R", "G", "B", "A",
+            "specular.R", "specular.G", "specular.B", "specular.A",
+        ])
+        self.assertEqual(info, [
+            {
+                "name": "",
+                "review_channels": {
+                    "R": "R",
+                    "G": "G",
+                    "B": "B",
+                    "A": "A",
+                },
+            },
+            {
+                "name": "diffuse",
+                "review_channels": {
+                    "R": "diffuse.R",
+                    "G": "diffuse.G",
+                    "B": "diffuse.B",
+                    "A": None,
+                },
+            },
+            {
+                "name": "specular",
+                "review_channels": {
+                    "R": "specular.R",
+                    "G": "specular.G",
+                    "B": "specular.B",
+                    "A": "specular.A",
+                },
+            },
+        ])