diff --git a/src/isobands.rs b/src/isobands.rs
index e4cf6ea..91d4d3d 100644
--- a/src/isobands.rs
+++ b/src/isobands.rs
@@ -114,7 +114,7 @@ pub(crate) struct Settings {
     pub max_v: f64,
 }
 
-static PRECISION: f64 = 1e-4;
+static PRECISION: f64 = f64::MIN_POSITIVE;
 
 /// Contours generator, using builder pattern, to
 /// be used on a rectangular `Slice` of values to
diff --git a/src/lib.rs b/src/lib.rs
index 1727835..6500d4b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -446,27 +446,6 @@ mod tests {
         assert_eq!(
             res[0].0,
             vec![
-                vec![
-                    Point::new(0.9999750000000001, 1.0),
-                    Point::new(1.0, 0.9999750000000001),
-                    Point::new(2.0, 0.9999750000000001),
-                    Point::new(3.0, 0.9999750000000001),
-                    Point::new(4.0, 0.9999750000000001),
-                    Point::new(5.0, 0.9999750000000001),
-                    Point::new(5.000025, 1.0),
-                    Point::new(5.000025, 2.0),
-                    Point::new(5.000025, 3.0),
-                    Point::new(5.000025, 4.0),
-                    Point::new(5.0, 4.000025),
-                    Point::new(4.0, 4.000025),
-                    Point::new(3.0, 4.000025),
-                    Point::new(2.0, 4.000025),
-                    Point::new(1.0, 4.000025),
-                    Point::new(0.9999750000000001, 4.0),
-                    Point::new(0.9999750000000001, 3.0),
-                    Point::new(0.9999750000000001, 2.0),
-                    Point::new(0.9999750000000001, 1.0)
-                ],
                 vec![
                     Point::new(1.0, 0.5),
                     Point::new(0.5, 1.0),
@@ -486,7 +465,20 @@ mod tests {
                     Point::new(4.0, 0.5),
                     Point::new(3.0, 0.5),
                     Point::new(2.0, 0.5),
-                    Point::new(1.0, 0.5)
+                    Point::new(1.0, 0.5),
+                ],
+                vec![
+                    Point::new(1.0, 2.0),
+                    Point::new(2.0, 1.0),
+                    Point::new(3.0, 1.0),
+                    Point::new(4.0, 1.0),
+                    Point::new(5.0, 2.0),
+                    Point::new(5.0, 3.0),
+                    Point::new(4.0, 4.0),
+                    Point::new(3.0, 4.0),
+                    Point::new(2.0, 4.0),
+                    Point::new(1.0, 3.0),
+                    Point::new(1.0, 2.0),
                 ]
             ]
         );