diff --git a/primitives/src/script/borrowed.rs b/primitives/src/script/borrowed.rs
index 4f3bca28c..e8591cf84 100644
--- a/primitives/src/script/borrowed.rs
+++ b/primitives/src/script/borrowed.rs
@@ -195,7 +195,7 @@ mod tests {
 
     #[test]
     fn script_is_empty() {
-        let script = Script::new();
+        let script: &Script = Default::default();
         assert!(script.is_empty());
 
         let script = Script::from_bytes(&[1, 2, 3]);
diff --git a/primitives/src/script/mod.rs b/primitives/src/script/mod.rs
index af9c4b429..51d18bca7 100644
--- a/primitives/src/script/mod.rs
+++ b/primitives/src/script/mod.rs
@@ -707,6 +707,23 @@ mod tests {
         assert!(ScriptHash::try_from(script).is_err());
     }
 
+    #[test]
+    fn try_from_scriptbuf_ref_for_scripthash() {
+        let script = ScriptBuf::from(vec![0x51; 520]);
+        assert!(ScriptHash::try_from(&script).is_ok());
+
+        let script = ScriptBuf::from(vec![0x51; 521]);
+        assert!(ScriptHash::try_from(&script).is_err());
+    }
+    #[test]
+    fn try_from_script_for_scripthash() {
+        let script = Script::from_bytes(&[0x51; 520]);
+        assert!(ScriptHash::try_from(script).is_ok());
+
+        let script = Script::from_bytes(&[0x51; 521]);
+        assert!(ScriptHash::try_from(script).is_err());
+    }
+
     #[test]
     fn try_from_scriptbuf_for_wscript_hash() {
         let script = ScriptBuf::from(vec![0x51; 10_000]);
@@ -716,6 +733,25 @@ mod tests {
         assert!(WScriptHash::try_from(script).is_err());
     }
 
+    #[test]
+    fn try_from_scriptbuf_ref_for_wscript_hash() {
+        let script = ScriptBuf::from(vec![0x51; 10_000]);
+        assert!(WScriptHash::try_from(&script).is_ok());
+
+        let script = ScriptBuf::from(vec![0x51; 10_001]);
+        assert!(WScriptHash::try_from(&script).is_err());
+    }
+
+
+    #[test]
+    fn try_from_script_for_wscript_hash() {
+        let script = Script::from_bytes(&[0x51; 10_000]);
+        assert!(WScriptHash::try_from(script).is_ok());
+
+        let script = Script::from_bytes(&[0x51; 10_001]);
+        assert!(WScriptHash::try_from(script).is_err());
+    }
+
     #[test]
     fn script_display() {
         let script = Script::from_bytes(&[0xa1, 0xb2, 0xc3]);