diff --git a/tests/by-util/test_join.rs b/tests/by-util/test_join.rs
index 2bbf637f9..be25b9390 100644
--- a/tests/by-util/test_join.rs
+++ b/tests/by-util/test_join.rs
@@ -337,3 +337,12 @@ fn non_line_feeds() {
         .succeeds()
         .stdout_only_fixture("non-line_feeds.expected");
 }
+
+#[test]
+fn non_unicode() {
+    new_ucmd!()
+        .arg("non-unicode_1.bin")
+        .arg("non-unicode_2.bin")
+        .succeeds()
+        .stdout_only_fixture("non-unicode.expected");
+}
diff --git a/tests/fixtures/join/non-unicode.expected b/tests/fixtures/join/non-unicode.expected
new file mode 100644
index 000000000..7c2e0d9af
Binary files /dev/null and b/tests/fixtures/join/non-unicode.expected differ
diff --git a/tests/fixtures/join/non-unicode_1.bin b/tests/fixtures/join/non-unicode_1.bin
new file mode 100644
index 000000000..e264bd505
Binary files /dev/null and b/tests/fixtures/join/non-unicode_1.bin differ
diff --git a/tests/fixtures/join/non-unicode_2.bin b/tests/fixtures/join/non-unicode_2.bin
new file mode 100644
index 000000000..6b336c669
Binary files /dev/null and b/tests/fixtures/join/non-unicode_2.bin differ