diff --git a/src/card/tests.rs b/src/card/tests.rs
index bf8b171..eb33a3f 100644
--- a/src/card/tests.rs
+++ b/src/card/tests.rs
@@ -269,7 +269,7 @@ mod test_impls {
     use crate::{
         card::{Card, PlayingCard, Rank, Suit},
         exactsizearr::ExactSizedArr,
-        zipcartesian::ZipCatersianExt,
+        zipcartesian::ZipCartesianExt,
     };
 
     #[test]
diff --git a/src/modes/pair.rs b/src/modes/pair.rs
index a01b5ad..e079813 100644
--- a/src/modes/pair.rs
+++ b/src/modes/pair.rs
@@ -91,7 +91,7 @@ mod tests {
     use crate::{
         card::{PlayingCard, Rank},
         modes::tests::test_footstool,
-        zipcartesian::ZipCatersianExt,
+        zipcartesian::ZipCartesianExt,
     };
 
     #[test]
diff --git a/src/modes/single.rs b/src/modes/single.rs
index aae5c52..8fead3c 100644
--- a/src/modes/single.rs
+++ b/src/modes/single.rs
@@ -54,7 +54,7 @@ mod tests {
     use std::collections::{HashMap, HashSet};
 
     use super::*;
-    use crate::{modes::tests::test_footstool, zipcartesian::ZipCatersianExt};
+    use crate::{modes::tests::test_footstool, zipcartesian::ZipCartesianExt};
 
     #[test]
     fn new() {
diff --git a/src/zipcartesian.rs b/src/zipcartesian.rs
index 932975f..77ce92b 100644
--- a/src/zipcartesian.rs
+++ b/src/zipcartesian.rs
@@ -1,6 +1,6 @@
 use std::iter::Iterator;
 
-pub trait ZipCatersianExt: Iterator {
+pub trait ZipCartesianExt: Iterator {
     fn zip_cartesian<B>(
         self,
         b: B,
@@ -11,7 +11,7 @@ pub trait ZipCatersianExt: Iterator {
         B: Iterator<Item: Copy> + Clone;
 }
 
-impl<I: Iterator<Item: Copy> + Clone> ZipCatersianExt for I {
+impl<I: Iterator<Item: Copy> + Clone> ZipCartesianExt for I {
     /// Exhaustive coupling of two iterators.
     /// For each x in `self`: for each y in `b`: yield (x, y).
     /// b: B must implement `Clone`.