diff --git a/tests/data/esbo-etc_defaults.xml b/tests/data/esbo-etc_defaults.xml
index e38e720..4555151 100644
--- a/tests/data/esbo-etc_defaults.xml
+++ b/tests/data/esbo-etc_defaults.xml
@@ -9,6 +9,7 @@
         <psf val="Airy" osf="10" comment="PSF of the optical system. Can be Airy or a file"/>
 <!--        <psf val="data/ps2f.txt" comment="PSF of the optical system. Can be Airy or a file"/>-->
         <jitter_sigma val="1" val_unit="arcsec" comment="Sigma of the telescope jitter"/>
+        <output path="output" format="fits" comment="Output directory to store output files"/>
         <exposure_time val="0.1" val_unit="s" comment="The exposure time"/>
 <!--        <output_path val="output" comment="Output directory to store output files"/>-->
     </common>