diff --git a/tests/array.rs b/tests/array.rs
index e3922ea8d..23c863789 100644
--- a/tests/array.rs
+++ b/tests/array.rs
@@ -9,10 +9,10 @@
 
 use approx::assert_relative_eq;
 use defmac::defmac;
-use itertools::{zip, Itertools};
+use itertools::Itertools;
+use ndarray::indices;
 use ndarray::prelude::*;
 use ndarray::{arr3, rcarr2};
-use ndarray::indices;
 use ndarray::{Slice, SliceInfo, SliceInfoElem};
 use num_complex::Complex;
 use std::convert::TryFrom;
@@ -499,13 +499,13 @@ fn test_index() {
         *elt = i;
     }
 
-    for ((i, j), a) in zip(indices((2, 3)), &A) {
+    for ((i, j), a) in indices((2, 3)).into_iter().zip(&A) {
         assert_eq!(*a, A[[i, j]]);
     }
 
     let vi = A.slice(s![1.., ..;2]);
     let mut it = vi.iter();
-    for ((i, j), x) in zip(indices((1, 2)), &mut it) {
+    for ((i, j), x) in indices((1, 2)).into_iter().zip(&mut it) {
         assert_eq!(*x, vi[[i, j]]);
     }
     assert!(it.next().is_none());
@@ -2071,9 +2071,8 @@ fn test_view_from_shape_ptr() {
 #[test]
 fn test_view_from_shape_ptr_deny_neg_strides() {
     let data = [0, 1, 2, 3, 4, 5];
-    let _view = unsafe {
-        ArrayView::from_shape_ptr((2, 3).strides((-3isize as usize, 1)), data.as_ptr())
-    };
+    let _view =
+        unsafe { ArrayView::from_shape_ptr((2, 3).strides((-3isize as usize, 1)), data.as_ptr()) };
 }
 
 #[should_panic(expected = "Unsupported")]
@@ -2466,74 +2465,48 @@ mod array_cow_tests {
 
 #[test]
 fn test_remove_index() {
-    let mut a = arr2(&[[1, 2, 3],
-                       [4, 5, 6],
-                       [7, 8, 9],
-                       [10,11,12]]);
+    let mut a = arr2(&[[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]]);
     a.remove_index(Axis(0), 1);
     a.remove_index(Axis(1), 2);
     assert_eq!(a.shape(), &[3, 2]);
-    assert_eq!(a,
-        array![[1, 2],
-               [7, 8],
-               [10,11]]);
-
-    let mut a = arr2(&[[1, 2, 3],
-                       [4, 5, 6],
-                       [7, 8, 9],
-                       [10,11,12]]);
+    assert_eq!(a, array![[1, 2], [7, 8], [10, 11]]);
+
+    let mut a = arr2(&[[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]]);
     a.invert_axis(Axis(0));
     a.remove_index(Axis(0), 1);
     a.remove_index(Axis(1), 2);
     assert_eq!(a.shape(), &[3, 2]);
-    assert_eq!(a,
-        array![[10,11],
-               [4, 5],
-               [1, 2]]);
+    assert_eq!(a, array![[10, 11], [4, 5], [1, 2]]);
 
     a.remove_index(Axis(1), 1);
 
     assert_eq!(a.shape(), &[3, 1]);
-    assert_eq!(a,
-        array![[10],
-               [4],
-               [1]]);
+    assert_eq!(a, array![[10], [4], [1]]);
     a.remove_index(Axis(1), 0);
     assert_eq!(a.shape(), &[3, 0]);
-    assert_eq!(a,
-        array![[],
-               [],
-               []]);
+    assert_eq!(a, array![[], [], []]);
 }
 
-#[should_panic(expected="must be less")]
+#[should_panic(expected = "must be less")]
 #[test]
 fn test_remove_index_oob1() {
-    let mut a = arr2(&[[1, 2, 3],
-                       [4, 5, 6],
-                       [7, 8, 9],
-                       [10,11,12]]);
+    let mut a = arr2(&[[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]]);
     a.remove_index(Axis(0), 4);
 }
 
-#[should_panic(expected="must be less")]
+#[should_panic(expected = "must be less")]
 #[test]
 fn test_remove_index_oob2() {
     let mut a = array![[10], [4], [1]];
     a.remove_index(Axis(1), 0);
     assert_eq!(a.shape(), &[3, 0]);
-    assert_eq!(a,
-        array![[],
-               [],
-               []]);
+    assert_eq!(a, array![[], [], []]);
     a.remove_index(Axis(0), 1); // ok
-    assert_eq!(a,
-        array![[],
-               []]);
+    assert_eq!(a, array![[], []]);
     a.remove_index(Axis(1), 0); // oob
 }
 
-#[should_panic(expected="index out of bounds")]
+#[should_panic(expected = "index out of bounds")]
 #[test]
 fn test_remove_index_oob3() {
     let mut a = array![[10], [4], [1]];
@@ -2552,14 +2525,10 @@ fn test_split_complex_view() {
 
 #[test]
 fn test_split_complex_view_roundtrip() {
-    let a_re = Array3::from_shape_fn((3,1,5), |(i, j, _k)| {
-        i * j
-    });
-    let a_im = Array3::from_shape_fn((3,1,5), |(_i, _j, k)| {
-        k
-    });
-    let a = Array3::from_shape_fn((3,1,5), |(i,j,k)| {
-        Complex::new(a_re[[i,j,k]], a_im[[i,j,k]])
+    let a_re = Array3::from_shape_fn((3, 1, 5), |(i, j, _k)| i * j);
+    let a_im = Array3::from_shape_fn((3, 1, 5), |(_i, _j, k)| k);
+    let a = Array3::from_shape_fn((3, 1, 5), |(i, j, k)| {
+        Complex::new(a_re[[i, j, k]], a_im[[i, j, k]])
     });
     let Complex { re, im } = a.view().split_complex();
     assert_eq!(a_re, re);
@@ -2590,18 +2559,18 @@ fn test_split_complex_zerod() {
 
 #[test]
 fn test_split_complex_permuted() {
-    let a = Array3::from_shape_fn((3, 4, 5), |(i, j, k)| {
-        Complex::new(i * k + j, k)
-    });
-    let permuted = a.view().permuted_axes([1,0,2]);
+    let a = Array3::from_shape_fn((3, 4, 5), |(i, j, k)| Complex::new(i * k + j, k));
+    let permuted = a.view().permuted_axes([1, 0, 2]);
     let Complex { re, im } = permuted.split_complex();
-    assert_eq!(re.get((3,2,4)).unwrap(), &11);
-    assert_eq!(im.get((3,2,4)).unwrap(), &4);
+    assert_eq!(re.get((3, 2, 4)).unwrap(), &11);
+    assert_eq!(im.get((3, 2, 4)).unwrap(), &4);
 }
 
 #[test]
 fn test_split_complex_invert_axis() {
-    let mut a = Array::from_shape_fn((2, 3, 2), |(i, j, k)| Complex::new(i as f64 + j as f64, i as f64 + k as f64));
+    let mut a = Array::from_shape_fn((2, 3, 2), |(i, j, k)| {
+        Complex::new(i as f64 + j as f64, i as f64 + k as f64)
+    });
     a.invert_axis(Axis(1));
     let cmplx = a.view().split_complex();
     assert_eq!(cmplx.re, a.mapv(|z| z.re));