diff --git a/test/image/baselines/gl3d_tet_colorscale.png b/test/image/baselines/gl3d_tet_colorscale.png
new file mode 100644
index 00000000000..0949182b9b2
Binary files /dev/null and b/test/image/baselines/gl3d_tet_colorscale.png differ
diff --git a/test/image/mocks/gl3d_tet_colorscale.json b/test/image/mocks/gl3d_tet_colorscale.json
new file mode 100644
index 00000000000..0319c93f8c8
--- /dev/null
+++ b/test/image/mocks/gl3d_tet_colorscale.json
@@ -0,0 +1,22 @@
+{
+  "data": [
+    {
+      "type":"mesh3d",
+      "y":[0, 0, 1, 2],
+      "x":[0, 1, 2, 0],
+      "z":[0, 2, 0, 1],
+      "i":[0, 0, 0, 1],
+      "j":[1, 2, 3, 2],
+      "k":[2, 3, 1, 3],
+      "colorscale": [
+        [0, "rgb(0, 0, 0)"],
+        [0.33, "rgb(255, 0, 0)"],
+        [0.66, "rgb(0, 255, 0)"],
+        [1, "rgb(0, 0, 255)"]
+      ],
+      "intensity": [0, 0.33, 0.66, 1]
+    }],
+  "layout": {
+    "title": "Tetrahedra Custom Colorscale"
+  }
+}