diff --git a/MANIFEST.in b/MANIFEST.in
index 9ec83e970d..9b59d0733c 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1 +1,2 @@
 prune message_ix_models/data/test/MESSAGEix-GLOBIOM_1.1_R11_no-policy_baseline
+prune message_ix_models/data/test/ssp