diff --git a/tests/it/array/binary/mutable.rs b/tests/it/array/binary/mutable.rs
index 9076b7fc2f3..67fd731d57f 100644
--- a/tests/it/array/binary/mutable.rs
+++ b/tests/it/array/binary/mutable.rs
@@ -99,7 +99,7 @@ fn pop_all_some() {
     a.push(Some(b"first"));
     a.push(Some(b"second"));
     a.push(Some(b"third"));
-    a.push(Some(b"firth"));
+    a.push(Some(b"fourth"));
 
     for _ in 0..4 {
         a.push(Some(b"aaaa"));
@@ -113,7 +113,7 @@ fn pop_all_some() {
     assert_eq!(a.pop(), Some(b"aaaa".to_vec()));
     assert_eq!(a.len(), 5);
     assert_eq!(a.pop(), Some(b"aaaa".to_vec()));
-    assert_eq!(a.pop(), Some(b"firth".to_vec()));
+    assert_eq!(a.pop(), Some(b"fourth".to_vec()));
     assert_eq!(a.pop(), Some(b"third".to_vec()));
     assert_eq!(a.pop(), Some(b"second".to_vec()));
     assert_eq!(a.pop(), Some(b"first".to_vec()));
diff --git a/tests/it/array/utf8/mutable.rs b/tests/it/array/utf8/mutable.rs
index 5226f310c73..8ee76476cbb 100644
--- a/tests/it/array/utf8/mutable.rs
+++ b/tests/it/array/utf8/mutable.rs
@@ -45,19 +45,19 @@ fn pop_all_some() {
     a.push(Some("first"));
     a.push(Some("second"));
     a.push(Some("third"));
-    a.push(Some("firth"));
+    a.push(Some("fourth"));
     for _ in 0..4 {
         a.push(Some("aaaa"));
     }
-    a.push(Some("bbbb"));
+    a.push(Some("こんにちは"));
 
-    assert_eq!(a.pop(), Some("bbbb".to_string()));
+    assert_eq!(a.pop(), Some("こんにちは".to_string()));
     assert_eq!(a.pop(), Some("aaaa".to_string()));
     assert_eq!(a.pop(), Some("aaaa".to_string()));
     assert_eq!(a.pop(), Some("aaaa".to_string()));
     assert_eq!(a.len(), 5);
     assert_eq!(a.pop(), Some("aaaa".to_string()));
-    assert_eq!(a.pop(), Some("firth".to_string()));
+    assert_eq!(a.pop(), Some("fourth".to_string()));
     assert_eq!(a.pop(), Some("third".to_string()));
     assert_eq!(a.pop(), Some("second".to_string()));
     assert_eq!(a.pop(), Some("first".to_string()));