diff --git a/modules/util/viirs.py b/modules/util/viirs.py
index b83e4b7d9886babc3b520fdf0edc8930ee614308..f371926ffcd42aae0dd1ee05362c3e52d1124b2d 100644
--- a/modules/util/viirs.py
+++ b/modules/util/viirs.py
@@ -81,3 +81,5 @@ def run_test(directory):
         if np.sum(np.isnan(opd_nl)) < opd_nl.size and np.sum(np.isnan(reff_nl)) < reff_nl.size:
             print(file)
 
+        h5f.close()
+