diff --git a/src/autodiff/gradient.rs b/src/autodiff/gradient.rs
index ccb74ca1..69edce0d 100644
--- a/src/autodiff/gradient.rs
+++ b/src/autodiff/gradient.rs
@@ -78,10 +78,9 @@ impl<'v, const N: usize> Gradient<&[Variable<'v>; N], Vec<f64>> for Vec<f64> {
 #[cfg(test)]
 mod test_gradient {
     use crate::autodiff::variables::variable::Variable;
+    use crate::RUSTQUANT_EPSILON as EPS;
     use crate::{assert_approx_equal, autodiff::*};
 
-    use std::f64::EPSILON as EPS;
-
     #[test]
     fn test_borrowed_vector() {
         let g = Graph::new();