diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7eb39deb..7e6f0353 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,6 +20,8 @@ set(VERSION_DATE "2018-08-04")
 set(PACKAGE_STRING "${PROJECT_NAME} ${VZLOGGER_RPM_VERSION}")
 set(VERSION "${VZLOGGER_RPM_VERSION}")
 set(CMAKE_VERBOSE_MAKEFILE 1)
+# Needed for TEST(mock_MeterOMS, first_packets)
+set(ENV{TZ} "Europe/Berlin")
 
 # debug build, on by default
 ADD_DEFINITIONS(-g3)
diff --git a/debian/rules b/debian/rules
index fe181a67..11114bd7 100755
--- a/debian/rules
+++ b/debian/rules
@@ -16,8 +16,6 @@ include /usr/share/dpkg/pkg-info.mk
 # Debian flags invented usage of LTO, which in combination with google test on
 # Ubuntu 22.04.4 causes the errors supressed below
 export CXXFLAGS += -Wno-lto-type-mismatch -Wno-odr
-# Needed for TEST(mock_MeterOMS, first_packets)
-export TZ="Europe/Berlin"
 
 VERSION1=$(shell echo ${DEB_VERSION_UPSTREAM} | cut -f1 -d.)
 VERSION2=$(shell echo ${DEB_VERSION_UPSTREAM} | cut -f2 -d.)