diff --git a/modules/gles3/functional/es3fShaderFragDataTests.cpp b/modules/gles3/functional/es3fShaderFragDataTests.cpp
index 46063c3..dd0e578 100644
--- a/modules/gles3/functional/es3fShaderFragDataTests.cpp
+++ b/modules/gles3/functional/es3fShaderFragDataTests.cpp
@@ -61,6 +61,24 @@
 	INDEX_EXPR_TYPE_LAST
 };
 
+static bool isExtensionSupported (const glu::RenderContext& renderCtx, const std::string& extension)
+{
+	const glw::Functions&	gl		= renderCtx.getFunctions();
+	int						numExts	= 0;
+
+	gl.getIntegerv(GL_NUM_EXTENSIONS, &numExts);
+
+	for (int ndx = 0; ndx < numExts; ndx++)
+	{
+		const char* curExt = (const char*)gl.getStringi(GL_EXTENSIONS, ndx);
+
+		if (extension == curExt)
+			return true;
+	}
+
+	return false;
+}
+
 static bool compareSingleColor (tcu::TestLog& log, const tcu::Surface& surface, tcu::RGBA expectedColor, tcu::RGBA threshold)
 {
 	const int	maxPrints			= 10;
@@ -227,7 +245,12 @@
 
 	IterateResult iterate (void)
 	{
-		const glu::RenderContext&		renderCtx		= m_context.getRenderContext();
+		const glu::RenderContext&		renderCtx			= m_context.getRenderContext();
+
+		int								num_test_attachment	= 2;
+		if(!isExtensionSupported(renderCtx, "GL_EXT_draw_buffers") && !isExtensionSupported(renderCtx, "GL_NV_draw_buffers"))
+			num_test_attachment = 1;
+
 		const glu::ShaderProgram		program			(renderCtx, glu::ProgramSources()
 															<< glu::VertexSource(
 																"attribute highp vec4 a_position;\n"
@@ -281,7 +304,7 @@
 			throw tcu::NotSupportedError("Dynamic indexing of gl_FragData[] not supported");
 
 		gl.bindFramebuffer(GL_FRAMEBUFFER, *fbo);
-		for (int ndx = 0; ndx < 2; ndx++)
+		for (int ndx = 0; ndx < num_test_attachment; ndx++)
 		{
 			const deUint32	rbo	= ndx == 0 ? *colorBuf0 : *colorBuf1;
 
@@ -304,7 +327,7 @@
 		bool			allOk		= true;
 		const tcu::RGBA threshold	= renderCtx.getRenderTarget().getPixelFormat().getColorThreshold() + tcu::RGBA(1,1,1,1);
 
-		for (int ndx = 0; ndx < 2; ndx++)
+		for (int ndx = 0; ndx < num_test_attachment; ndx++)
 		{
 			gl.clearBufferfv(GL_COLOR, 0, tcu::RGBA::red().toVec().getPtr());
 			gl.clearBufferfv(GL_COLOR, 1, tcu::RGBA::red().toVec().getPtr());