diff --git a/test_common/harness/imageHelpers.cpp b/test_common/harness/imageHelpers.cpp
index 6a990104..0f8f1a58 100644
--- a/test_common/harness/imageHelpers.cpp
+++ b/test_common/harness/imageHelpers.cpp
@@ -137,10 +137,10 @@ uint32_t get_channel_order_channel_count(cl_channel_order order)
         case CL_RGx: return 2;
 
         case CL_RGB:
-        case CL_RGBx:
-        case CL_sRGB:
-        case CL_sRGBx: return 3;
+        case CL_sRGB: return 3;
 
+        case CL_RGBx:
+        case CL_sRGBx:
         case CL_RGBA:
         case CL_ARGB:
         case CL_BGRA: