diff --git a/test/go/src/bin/testclient/main.go b/test/go/src/bin/testclient/main.go
index d0e5ff8..7a7af72 100644
--- a/test/go/src/bin/testclient/main.go
+++ b/test/go/src/bin/testclient/main.go
@@ -122,7 +122,16 @@
 		t.Fatalf("Unexpected TestDouble() result expected 42.42, got %f ", d)
 	}
 
-	// TODO: add TestBinary() call
+	binout := make([]byte, 256)
+	for i := 0; i < 256; i++ {
+		binout[i] = byte(i)
+	}
+	bin, err := client.TestBinary(binout)
+	for i := 0; i < 256; i++ {
+		if (binout[i] != bin[i]) {
+			t.Fatalf("Unexpected TestBinary() result expected %d, got %d ", binout[i], bin[i])
+		}
+	}
 	
 	xs := thrifttest.NewXtruct()
 	xs.StringThing = "thing"