diff --git a/.github/workflows/debuild.yml b/.github/workflows/debuild.yml
index 5f60dc70..dce825ca 100644
--- a/.github/workflows/debuild.yml
+++ b/.github/workflows/debuild.yml
@@ -27,11 +27,6 @@ jobs:
       - name: Set env
         # Here we are setting a variable from an expression.
         run: echo "TAG_NAME=${GITHUB_REF##*/}" >> $GITHUB_ENV
-      - name: Set timezone
-        # Needed for TEST(mock_MeterOMS, first_packets)
-        run: |
-          sudo timedatectl set-timezone "Europe/Berlin"
-          sudo dpkg-reconfigure --frontend noninteractive tzdata
       - name: add cloudsmith repo
         run: |
           LISTENTRY="deb [signed-by=$KEYFILE] $CLOUDURL/debian trixie main"
@@ -112,11 +107,6 @@ jobs:
     env:
       PBRT: /var/cache/pbuilder
     steps:
-      - name: Set timezone
-        # Needed for TEST(mock_MeterOMS, first_packets)
-        run: |
-          sudo timedatectl set-timezone "Europe/Berlin"
-          sudo dpkg-reconfigure --frontend noninteractive tzdata
       - name: update repo information
         run: sudo apt-get update
       - name: install archive keyring
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 210ad2f2..9409bef4 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -88,7 +88,7 @@ IF(GCOV_PATH AND LCOV_PATH AND GENHTML_PATH)
         COMMAND vzlogger_unit_tests
         COMMAND mock_metermap
         COMMAND mock_MeterW1therm
-        COMMAND mock_MeterOMS
+        COMMAND TZ="Europe/Berlin" mock_MeterOMS
         COMMAND mock_MeterS0
 
         # Capturing lcov counters and generating report