Add a couple more test cases
diff --git a/tests/modulus.txt b/tests/modulus.txt
index 70fd98f..e253989 100644
--- a/tests/modulus.txt
+++ b/tests/modulus.txt
@@ -63,3 +63,4 @@
 -15 % -7
 -12784956 % -32746
 -127849612 % -23712347682193
+-3191280681 % 641165986
diff --git a/tests/subtract.txt b/tests/subtract.txt
index eece3ed..4fdebea 100644
--- a/tests/subtract.txt
+++ b/tests/subtract.txt
@@ -27,3 +27,4 @@
 -0.38476284395876345 - -94875394587623.2357869324857
 -4674596708467.34754789403674343567 - -48672394852354698.237548629345
 979519669 - 3018100865
+929002449 - 3280677283