diff --git a/sdk/tests/conformance/rendering/blending.html b/sdk/tests/conformance/rendering/blending.html
index b14705cd50..9e68aa2650 100644
--- a/sdk/tests/conformance/rendering/blending.html
+++ b/sdk/tests/conformance/rendering/blending.html
@@ -146,7 +146,8 @@
         debug('Blending for RGBA8:');
 
         const gl = CreateContext();
-        fb = CreateValidFb(gl, [[gl.RGBA8, gl.RGBA, gl.UNSIGNED_BYTE]]);
+        // Do not use RGBA8 enum on WebGL 1.0
+        fb = CreateValidFb(gl, [[gl.texImage3D ? gl.RGBA8 : undefined, gl.RGBA, gl.UNSIGNED_BYTE]]);
         shouldBeNonNull('fb');
 
         // Regardless of the context version and enabled extensions,