From 52ef51f36e005a5d7033c21d08cfae17a561ebca Mon Sep 17 00:00:00 2001
From: Kit <kit@talecamp.com>
Date: Thu, 25 Jan 2018 22:56:48 +0100
Subject: [PATCH 1/2] Add test for issue #1889

---
 spacy/tests/regression/test_issue1889.py | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 spacy/tests/regression/test_issue1889.py

diff --git a/spacy/tests/regression/test_issue1889.py b/spacy/tests/regression/test_issue1889.py
new file mode 100644
index 000000000..a0e20abcf
--- /dev/null
+++ b/spacy/tests/regression/test_issue1889.py
@@ -0,0 +1,11 @@
+# coding: utf-8
+from __future__ import unicode_literals
+from ...lang.lex_attrs import is_stop
+from ...lang.en.stop_words import STOP_WORDS
+
+import pytest
+
+
+@pytest.mark.parametrize('word', ['the'])
+def test_lex_attrs_stop_words_case_sensitivity(word):
+    assert is_stop(word, STOP_WORDS) == is_stop(word.upper(), STOP_WORDS)

From 4b42267ba3e2c26098e258f36e5529535a9e7d4f Mon Sep 17 00:00:00 2001
From: Kit <kit@talecamp.com>
Date: Thu, 25 Jan 2018 23:17:22 +0100
Subject: [PATCH 2/2] Fix issue #1889

---
 spacy/lang/lex_attrs.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/spacy/lang/lex_attrs.py b/spacy/lang/lex_attrs.py
index c3bb4a8ff..d9b84e666 100644
--- a/spacy/lang/lex_attrs.py
+++ b/spacy/lang/lex_attrs.py
@@ -136,7 +136,7 @@ def is_lower(string): return string.islower()
 def is_space(string): return string.isspace()
 def is_title(string): return string.istitle()
 def is_upper(string): return string.isupper()
-def is_stop(string, stops=set()): return string in stops
+def is_stop(string, stops=set()): return string.lower() in stops
 def is_oov(string): return True
 def get_prob(string): return -20.