diff --git a/MANIFEST.in b/MANIFEST.in
index 97bddaf..6c00bc2 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -9,6 +9,7 @@ include lusSTR/tests/data/UAS_bulk_input/*
 include lusSTR/tests/data/snps/*
 include lusSTR/tests/data/RU_stutter_test/*
 include lusSTR/tests/data/NGS_stutter_test/*
+include lusSTR/tests/data/NGS_stutter_test/custom/*
 include lusSTR/tests/data/kinsnps/*
 include lusSTR/tests/data/lusstr_output/*
 include lusSTR/tests/data/LUSPlus_stutter_test/*