diff --git a/jass/test/data_real/combination_phenotypes.tsv b/jass/test/data_real/combination_phenotypes.tsv
new file mode 100644
index 0000000000000000000000000000000000000000..756625ed3123c84c8a5a1cc65d941ecbcd56f65e
--- /dev/null
+++ b/jass/test/data_real/combination_phenotypes.tsv
@@ -0,0 +1,2 @@
+GRP1,z_MAGIC_FAST-GLUCOSE z_MAGIC_FAST-INSULIN z_MAGIC_GLUCOSE-TOLERANCE z_MAGIC_HBA1C
+GRP2,z_MAGIC_FAST-GLUCOSE z_MAGIC_FAST-INSULIN z_MAGIC_GLUCOSE-TOLERANCE