diff --git a/.travis.yml b/.travis.yml
index 32e6739cee4..da8ea94091f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -33,7 +33,7 @@ env:
     - DOCKER_REPONAME=lbnlblum
     - BUILDINGSPY_VERSION=BuildingsPy@0bc654fd913c83f64163be167807e8989eff0293
     - OMC_VERSION=ubuntu-2204-omc:1.24.0-1
-    - OPTIMICA_VERSION=travis-ubuntu-2204-optimica:1.51.6
+    - OPTIMICA_VERSION=travis-ubuntu-2204-optimica:1.55.11
     - DYMOLA_VERSION=travis_ubuntu-2004_dymola:2025x-x86_64
     - ENERGYPLUS_9_6_0=EnergyPlus-9.6.0-f420c06a69-Linux-Ubuntu20.04-x86_64
     - ENERGYPLUS_23_1_0=EnergyPlus-23.1.0-87ed9199d4-Linux-Ubuntu20.04-x86_64
diff --git a/Buildings/Resources/Scripts/BuildingsPy/conf.yml b/Buildings/Resources/Scripts/BuildingsPy/conf.yml
index 34e6b3214d0..fa79c9bfe21 100644
--- a/Buildings/Resources/Scripts/BuildingsPy/conf.yml
+++ b/Buildings/Resources/Scripts/BuildingsPy/conf.yml
@@ -79,7 +79,8 @@
     comment: 'Simulation works locally, see https://github.com/lbl-srg/modelica-buildings/issues/3910'
     simulate: false
   optimica:
-    time_out: 600
+    comment: Timeout after 600 seconds
+    simulate: false
 - model_name: Buildings.DHC.Plants.Combined.Validation.AllElectricCWStorage
   optimica:
     comment: Simulation times out
@@ -139,16 +140,16 @@
     comment: Timeout during translation
     time_out: 600
   optimica:
-    comment: Timeout on travis
-    time_out: 600
+    comment: timeout on travis after 600s, https://app.travis-ci.com/github/lbl-srg/modelica-buildings/jobs/630222413
+    translate: false
 - model_name: Buildings.Examples.VAVReheat.Validation.Guideline36SteadyState
   openmodelica:
     comment: simulation terminated by an assertion at initialization
     simulate: false
     time_out: 600
   optimica:
-    comment: timeout on travis after 300s, https://app.travis-ci.com/github/lbl-srg/modelica-buildings/jobs/618700275
-    time_out: 600
+    comment: timeout on travis after 600s, https://app.travis-ci.com/github/lbl-srg/modelica-buildings/jobs/630222413
+    translate: false
 - model_name: Buildings.Fluid.Examples.FlowSystem.Basic
   openmodelica:
     comment: '''omc'' caused ''simulation terminated by an assertion at initialization''.'
@@ -309,6 +310,9 @@
   openmodelica:
     comment: Translation failed.
     translate: false
+  optimica:
+    comment: PyModelicaException due to NullPointerException
+    translate: false
 - model_name: Buildings.Templates.Plants.HeatPumps.Components.Validation.ValvesIsolation
   openmodelica:
     comment: Translation failed.