diff --git a/lib/src/lib.rs b/lib/src/lib.rs
index 70c81b7..8322161 100644
--- a/lib/src/lib.rs
+++ b/lib/src/lib.rs
@@ -50,7 +50,7 @@ impl BytesPattern {
 impl FromStr for BytesPattern {
     type Err = &'static str;
     fn from_str(str_val: &str) -> Result<Self, Self::Err> {
-        if str_val.is_empty() {    
+        if str_val.is_empty() {
             return Err("string is empty");
         }
 
@@ -132,7 +132,7 @@ mod tests {
     #[test]
     fn bytes_from_pattern() {
         let src_pattern = "E8 4D F8 FF 83 C4 85 C0 5F 75 32 8B 54 24 48 50 50";
-        let pattern = BytesPattern::from(src_pattern);
+        let pattern: BytesPattern = src_pattern.parse().unwrap();
         let bytes: Vec<u8> = vec![
             0xE8, 0x4D, 0xF8, 0xFF, 0x83, 0xC4, 0x85, 0xC0, 0x5F, 0x75, 0x32, 0x8B, 0x54, 0x24,
             0x48, 0x50, 0x50,
@@ -142,7 +142,7 @@ mod tests {
     #[test]
     fn mask_from_pattern() {
         let src_pattern = "E8 ?? ?? FF ?? C4 ?? ?? 5F 75 32 ?? 54 24 48 50 50";
-        let pattern = BytesPattern::from(src_pattern);
+        let pattern: BytesPattern = src_pattern.parse().unwrap();
         let mask: Vec<bool> = vec![
             false, true, true, false, true, false, true, true, false, false, false, true, false,
             false, false, false, false,
@@ -155,7 +155,7 @@ mod tests {
             0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF, 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66,
         ];
         let src_pattern = "EE FF 00 11 22";
-        let pattern = BytesPattern::from(src_pattern);
+        let pattern: BytesPattern = src_pattern.parse().unwrap();
         let offset = src_data.as_slice().find_pattern_first(&pattern);
         assert_eq!(offset, 4);
     }
@@ -166,7 +166,7 @@ mod tests {
             0xDD, 0xAA, 0xBB, 0xCC,
         ];
         let src_pattern = "AA BB CC AA BB DD";
-        let pattern = BytesPattern::from(src_pattern);
+        let pattern: BytesPattern = src_pattern.parse().unwrap();
         let offset = src_data.as_slice().find_pattern_first(&pattern);
         assert_eq!(offset, 9);
     }
@@ -174,7 +174,7 @@ mod tests {
     fn prefix_function() {
         let src_pattern = "AA BB BB AA AA BB BB AA BB";
         let expected_pi: Vec<usize> = vec![0, 0, 0, 1, 1, 2, 3, 4, 2];
-        let pattern = BytesPattern::from(src_pattern);
+        let pattern: BytesPattern = src_pattern.parse().unwrap();
         assert_eq!(pattern.pi, expected_pi);
     }
     #[test]
@@ -187,7 +187,7 @@ mod tests {
         ];
         let src_pattern = "EE FF 00 11 22";
         let replacement = "99 88 77 66 55";
-        let pattern = BytesPattern::from(src_pattern);
+        let pattern: BytesPattern = src_pattern.parse().unwrap();
         let offset = src_data.as_slice().find_pattern_first(&pattern);
 
         let replacement = replacement.replace(" ", "");