diff --git a/tests/io/file_long_read.py b/tests/io/file_long_read.py
new file mode 100644
index 000000000..8bdd48450
--- /dev/null
+++ b/tests/io/file_long_read.py
@@ -0,0 +1,3 @@
+f = open("io/data/file1")
+b = f.read(100)
+print(len(b))