diff --git a/tests/data/target/target_demo_2.csv b/tests/data/target/target_demo_2.csv
new file mode 100644
index 0000000..9e57c2b
--- /dev/null
+++ b/tests/data/target/target_demo_2.csv
@@ -0,0 +1,11 @@
+wavelength [um],spectral flux density [W/(m^2*um)]
+0.200,1.1e-12
+0.201,1.2e-12
+0.202,1.3e-12
+0.203,1.4e-12
+0.204,1.5e-12
+0.205,1.6e-12
+0.206,1.7e-12
+0.207,1.8e-12
+0.208,1.9e-12
+0.209,2.0e-12