diff --git a/test_suite/tests/any.rs b/test_suite/tests/any.rs
index 471a56b..c588ed9 100644
--- a/test_suite/tests/any.rs
+++ b/test_suite/tests/any.rs
@@ -200,7 +200,10 @@ mod traits {
 
             {
                 let err = "5,5".parse::<Position>().unwrap_err();
-                assert_eq!(err.to_string(), "Failed to parse Position: invalid");
+                assert_eq!(
+                    err.to_string(),
+                    "Failed to parse Position: Position failed the predicate test."
+                );
             }
         }
     }
@@ -284,7 +287,10 @@ mod traits {
 
                 {
                     let err = serde_json::from_str::<LinePoint>("{\"x\":7,\"y\":9}").unwrap_err();
-                    assert_eq!(err.to_string(), "invalid, expected valid LinePoint");
+                    assert_eq!(
+                        err.to_string(),
+                        "LinePoint failed the predicate test. Expected valid LinePoint"
+                    );
                 }
 
                 {
diff --git a/test_suite/tests/float.rs b/test_suite/tests/float.rs
index a42112b..6ebc2bc 100644
--- a/test_suite/tests/float.rs
+++ b/test_suite/tests/float.rs
@@ -253,7 +253,10 @@ mod validators {
 
             let err = Percentage::try_from(-0.1).unwrap_err();
 
-            assert_eq!(err.to_string(), "too small");
+            assert_eq!(
+                err.to_string(),
+                "Percentage is too small. The value must be greater or equal to 0.0."
+            );
         }
     }
 }
@@ -457,7 +460,10 @@ mod traits {
 
         // Unhappy path: validation error
         let err: DistParseError = "12.35".parse::<Dist>().unwrap_err();
-        assert_eq!(err.to_string(), "Failed to parse Dist: too big");
+        assert_eq!(
+            err.to_string(),
+            "Failed to parse Dist: Dist is too big. The value must be less than 12.34."
+        );
     }
 
     #[test]
diff --git a/test_suite/tests/integer.rs b/test_suite/tests/integer.rs
index 4c8d5bb..0052622 100644
--- a/test_suite/tests/integer.rs
+++ b/test_suite/tests/integer.rs
@@ -220,7 +220,10 @@ mod validators {
 
             let err = Age::try_from(17).unwrap_err();
 
-            assert_eq!(err.to_string(), "too small");
+            assert_eq!(
+                err.to_string(),
+                "Age is too small. The value must be greater or equal to 18."
+            );
         }
     }
 }
@@ -608,7 +611,10 @@ mod traits {
 
         // Unhappy path: validation error
         let err: AgeParseError = "101".parse::<Age>().unwrap_err();
-        assert_eq!(err.to_string(), "Failed to parse Age: too big");
+        assert_eq!(
+            err.to_string(),
+            "Failed to parse Age: Age is too big. The value must be less or equal to 99."
+        );
     }
 
     #[test]
diff --git a/test_suite/tests/string.rs b/test_suite/tests/string.rs
index 6a1cf9e..43a67bd 100644
--- a/test_suite/tests/string.rs
+++ b/test_suite/tests/string.rs
@@ -223,7 +223,7 @@ mod validators {
         #[nutype(validate(not_empty))]
         pub struct Email(String);
 
-        assert_eq!(EmailError::NotEmptyViolated.to_string(), "empty");
+        assert_eq!(EmailError::NotEmptyViolated.to_string(), "Email is empty.");
     }
 
     mod when_boundaries_defined_as_constants {