diff --git a/tests/unicode/data/utf-8_invalid.txt b/tests/unicode/data/utf-8_invalid.txt
new file mode 100644
index 0000000000..50020482bf
--- /dev/null
+++ b/tests/unicode/data/utf-8_invalid.txt
@@ -0,0 +1 @@
+aa˙bb
diff --git a/tests/unicode/file_invalid.py b/tests/unicode/file_invalid.py
new file mode 100644
index 0000000000..3f7f184062
--- /dev/null
+++ b/tests/unicode/file_invalid.py
@@ -0,0 +1,5 @@
+try:
+    f = open("unicode/data/utf-8_invalid.txt", encoding="utf-8")
+    f.read()
+except UnicodeError:
+    print("UnicodeError")