diff --git a/q2_types/feature_data/tests/data/empty.txt b/q2_types/feature_data/tests/data/empty.txt
new file mode 100644
index 00000000..e69de29b
diff --git a/q2_types/feature_data/tests/data/sequence_characteristics_length.txt b/q2_types/feature_data/tests/data/sequence_characteristics_length.txt
new file mode 100644
index 00000000..e088b9b8
--- /dev/null
+++ b/q2_types/feature_data/tests/data/sequence_characteristics_length.txt
@@ -0,0 +1,3 @@
+id	length
+1	876
+2	54
diff --git a/q2_types/feature_data/tests/data/sequence_characteristics_only_index.txt b/q2_types/feature_data/tests/data/sequence_characteristics_only_index.txt
new file mode 100644
index 00000000..60ec7060
--- /dev/null
+++ b/q2_types/feature_data/tests/data/sequence_characteristics_only_index.txt
@@ -0,0 +1,3 @@
+id
+1
+2
\ No newline at end of file