diff --git a/bigint/src/lib.rs b/bigint/src/lib.rs
index 5d261da..de6f223 100644
--- a/bigint/src/lib.rs
+++ b/bigint/src/lib.rs
@@ -121,7 +121,7 @@ use std::hash;
 #[cfg(test)]
 fn hash<T: hash::Hash>(x: &T) -> u64 {
     use std::hash::Hasher;
-    let mut hasher = hash::SipHasher::new();
+    let mut hasher = std::collections::hash_map::DefaultHasher::new();
     x.hash(&mut hasher);
     hasher.finish()
 }
diff --git a/complex/src/lib.rs b/complex/src/lib.rs
index c73cb42..339a1f2 100644
--- a/complex/src/lib.rs
+++ b/complex/src/lib.rs
@@ -766,7 +766,7 @@ impl<T> serde::Deserialize for Complex<T> where
 #[cfg(test)]
 fn hash<T: hash::Hash>(x: &T) -> u64 {
     use std::hash::Hasher;
-    let mut hasher = hash::SipHasher::new();
+    let mut hasher = std::collections::hash_map::DefaultHasher::new();
     x.hash(&mut hasher);
     hasher.finish()
 }
diff --git a/rational/src/lib.rs b/rational/src/lib.rs
index ce88516..02a17a7 100644
--- a/rational/src/lib.rs
+++ b/rational/src/lib.rs
@@ -671,7 +671,7 @@ impl RatioErrorKind {
 #[cfg(test)]
 fn hash<T: hash::Hash>(x: &T) -> u64 {
     use std::hash::Hasher;
-    let mut hasher = hash::SipHasher::new();
+    let mut hasher = std::collections::hash_map::DefaultHasher::new();
     x.hash(&mut hasher);
     hasher.finish()
 }