diff --git a/test-requirements.txt b/test-requirements.txt
index 4332f023..9f9467f5 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,5 +1,6 @@
 astropy>=5.0
 astroquery>=0.4.7
+pandas
 corner>=2.2.0
 emcee>=3.1.0
 lmfit>=1.0.3