diff --git a/Buildings/Resources/Scripts/BuildingsPy/conf.yml b/Buildings/Resources/Scripts/BuildingsPy/conf.yml
index 34e6b3214d0..88555f0e9b3 100644
--- a/Buildings/Resources/Scripts/BuildingsPy/conf.yml
+++ b/Buildings/Resources/Scripts/BuildingsPy/conf.yml
@@ -253,6 +253,10 @@
   openmodelica:
     comment: simulation terminated by an assertion at initialization.
     simulate: false
+- model_name: Buildings.Fluid.Humidifiers.Validation.DXDehumidifier
+  optimica:
+    comment: timeout on travis after 300s, https://app.travis-ci.com/github/lbl-srg/modelica-buildings/jobs/628320833
+    time_out: 600
 - model_name: Buildings.Fluid.HydronicConfigurations.ActiveNetworks.Examples.DecouplingMixing
   optimica:
     comment: 'The following equation(s) could not be matched to any variable: isEna.u = loa.ctl.cha.pre_u_start...'