diff --git a/inst/extdata/rna_pub_metadata.tsv b/inst/extdata/rna_pub_metadata.tsv
new file mode 100644
index 0000000000000000000000000000000000000000..c48070ebfff78df4a98f2601656430c59d1f8ba0
--- /dev/null
+++ b/inst/extdata/rna_pub_metadata.tsv
@@ -0,0 +1,41 @@
+"genotype"	"environment"	"sample_name"
+"genotype1"	"env1"	"env1_genotype1_1"
+"genotype1"	"env1"	"env1_genotype1_2"
+"genotype1"	"env1"	"env1_genotype1_3"
+"genotype1"	"env1"	"env1_genotype1_4"
+"genotype1"	"env1"	"env1_genotype1_5"
+"genotype2"	"env1"	"env1_genotype2_1"
+"genotype2"	"env1"	"env1_genotype2_2"
+"genotype2"	"env1"	"env1_genotype2_3"
+"genotype2"	"env1"	"env1_genotype2_4"
+"genotype2"	"env1"	"env1_genotype2_5"
+"genotype1"	"env2"	"env2_genotype1_1"
+"genotype1"	"env2"	"env2_genotype1_2"
+"genotype1"	"env2"	"env2_genotype1_3"
+"genotype1"	"env2"	"env2_genotype1_4"
+"genotype1"	"env2"	"env2_genotype1_5"
+"genotype2"	"env2"	"env2_genotype2_1"
+"genotype2"	"env2"	"env2_genotype2_2"
+"genotype2"	"env2"	"env2_genotype2_3"
+"genotype2"	"env2"	"env2_genotype2_4"
+"genotype2"	"env2"	"env2_genotype2_5"
+"genotype1"	"env3"	"env3_genotype1_1"
+"genotype1"	"env3"	"env3_genotype1_2"
+"genotype1"	"env3"	"env3_genotype1_3"
+"genotype1"	"env3"	"env3_genotype1_4"
+"genotype1"	"env3"	"env3_genotype1_5"
+"genotype2"	"env3"	"env3_genotype2_1"
+"genotype2"	"env3"	"env3_genotype2_2"
+"genotype2"	"env3"	"env3_genotype2_3"
+"genotype2"	"env3"	"env3_genotype2_4"
+"genotype2"	"env3"	"env3_genotype2_5"
+"genotype1"	"env4"	"env4_genotype1_1"
+"genotype1"	"env4"	"env4_genotype1_2"
+"genotype1"	"env4"	"env4_genotype1_3"
+"genotype1"	"env4"	"env4_genotype1_4"
+"genotype1"	"env4"	"env4_genotype1_5"
+"genotype2"	"env4"	"env4_genotype2_1"
+"genotype2"	"env4"	"env4_genotype2_2"
+"genotype2"	"env4"	"env4_genotype2_3"
+"genotype2"	"env4"	"env4_genotype2_4"
+"genotype2"	"env4"	"env4_genotype2_5"