diff --git a/src/print.rs b/src/print.rs
index 750dc9b..9b5bede 100644
--- a/src/print.rs
+++ b/src/print.rs
@@ -326,6 +326,18 @@ mod test {
         assert_eq!("lwu x28, 1520(x17)", print::print(lwu, 0));
     }
 
+    #[test]
+    fn test_opw() {                                         
+        let addw: decode::Instruction = decode::decode(0b0000000_10000_10001_000_11100_0111011);
+        let sllw: decode::Instruction = decode::decode(0b0000000_10000_10001_001_11100_0111011);
+        let srlw: decode::Instruction = decode::decode(0b0000000_10000_10001_101_11100_0111011);
+        let sraw: decode::Instruction = decode::decode(0b0100000_10000_10001_101_11100_0111011);
+
+        assert_eq!("addw x28, x17, x16", print::print(addw, 0));
+        assert_eq!("sllw x28, x17, x16", print::print(sllw, 0));
+        assert_eq!("srlw x28, x17, x16", print::print(srlw, 0));
+        assert_eq!("sraw x28, x17, x16", print::print(sraw, 0));
+    }
 
 
 }
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