diff --git a/tests/by-util/test_mktemp.rs b/tests/by-util/test_mktemp.rs
index 1d5b943580e..af6e4656a39 100644
--- a/tests/by-util/test_mktemp.rs
+++ b/tests/by-util/test_mktemp.rs
@@ -745,8 +745,16 @@ fn test_nonexistent_tmpdir_env_var() {
         let result = new_ucmd!().env(TMPDIR, r"no\such\dir").fails();
         result.no_stdout();
         let stderr = result.stderr_str();
-        assert!(stderr.starts_with("mktemp: failed to create file via template"));
-        assert!(stderr.ends_with(r"no\such\dir/tmp.XXXXXXXXXX': No such file or directory\n"));
+        assert!(
+            stderr.starts_with("mktemp: failed to create file via template"),
+            "{}",
+            stderr
+        );
+        assert!(
+            stderr.ends_with("no\\such\\dir/tmp.XXXXXXXXXX': No such file or directory\n"),
+            "{}",
+            stderr
+        );
     }
 
     #[cfg(not(windows))]
@@ -756,8 +764,16 @@ fn test_nonexistent_tmpdir_env_var() {
         let result = new_ucmd!().env(TMPDIR, r"no\such\dir").arg("-d").fails();
         result.no_stdout();
         let stderr = result.stderr_str();
-        assert!(stderr.starts_with("mktemp: failed to create directory via template"));
-        assert!(stderr.ends_with(r"no\such\dir/tmp.XXXXXXXXXX': No such file or directory\n"));
+        assert!(
+            stderr.starts_with("mktemp: failed to create directory via template"),
+            "{}",
+            stderr
+        );
+        assert!(
+            stderr.ends_with("no\\such\\dir/tmp.XXXXXXXXXX': No such file or directory\n"),
+            "{}",
+            stderr
+        );
     }
 }
 
@@ -772,8 +788,16 @@ fn test_nonexistent_dir_prefix() {
         let result = new_ucmd!().arg(r"d\XXX").fails();
         result.no_stdout();
         let stderr = result.stderr_str();
-        assert!(stderr.starts_with("mktemp: failed to create file via template"));
-        assert!(stderr.ends_with(r"d\XXX': No such file or directory\n"));
+        assert!(
+            stderr.starts_with("mktemp: failed to create file via template"),
+            "{}",
+            stderr
+        );
+        assert!(
+            stderr.ends_with("d\\XXX': No such file or directory\n"),
+            "{}",
+            stderr
+        );
     }
 
     #[cfg(not(windows))]
@@ -785,7 +809,15 @@ fn test_nonexistent_dir_prefix() {
         let result = new_ucmd!().arg("-d").arg(r"d\XXX").fails();
         result.no_stdout();
         let stderr = result.stderr_str();
-        assert!(stderr.starts_with("mktemp: failed to create file via template"));
-        assert!(stderr.ends_with(r"d\XXX': No such file or directory\n"));
+        assert!(
+            stderr.starts_with("mktemp: failed to create file via template"),
+            "{}",
+            stderr
+        );
+        assert!(
+            stderr.ends_with("d\\XXX': No such file or directory\n"),
+            "{}",
+            stderr
+        );
     }
 }