diff --git a/contrib/cirrus/lib.sh b/contrib/cirrus/lib.sh
index a7f39e7afa..5d3e43c50a 100644
--- a/contrib/cirrus/lib.sh
+++ b/contrib/cirrus/lib.sh
@@ -91,7 +91,7 @@ EPOCH_TEST_COMMIT="$CIRRUS_BASE_SHA"
 # testing operations on all platforms and versions.  This is necessary
 # to avoid needlessly passing through global/system values across
 # contexts, such as host->container or root->rootless user
-PASSTHROUGH_ENV_RE='(^CI.*)|(^CIRRUS)|(^DISTRO_NV)|(^GOPATH)|(^GOCACHE)|(^GOSRC)|(^SCRIPT_BASE)|(CGROUP_MANAGER)|(OCI_RUNTIME)|(^TEST.*)|(^PODBIN_NAME)|(^PRIV_NAME)|(^ALT_NAME)|(^ROOTLESS_USER)|(SKIP_USERNS)|(.*_NAME)|(.*_FQIN)|(NETWORK_BACKEND)'
+PASSTHROUGH_ENV_RE='(^CI.*)|(^CIRRUS)|(^DISTRO_NV)|(^GOPATH)|(^GOCACHE)|(^GOSRC)|(^SCRIPT_BASE)|(CGROUP_MANAGER)|(OCI_RUNTIME)|(^TEST.*)|(^PODBIN_NAME)|(^PRIV_NAME)|(^ALT_NAME)|(^ROOTLESS_USER)|(SKIP_USERNS)|(.*_NAME)|(.*_FQIN)|(NETWORK_BACKEND)|(DEST_BRANCH)'
 # Unsafe env. vars for display
 SECRET_ENV_RE='(ACCOUNT)|(GC[EP]..+)|(SSH)|(PASSWORD)|(TOKEN)'
 
diff --git a/contrib/cirrus/setup_environment.sh b/contrib/cirrus/setup_environment.sh
index 832cb58aba..f31cd6eeb8 100755
--- a/contrib/cirrus/setup_environment.sh
+++ b/contrib/cirrus/setup_environment.sh
@@ -25,7 +25,7 @@ msg "************************************************************"
 show_env_vars
 
 req_env_vars USER HOME GOSRC SCRIPT_BASE TEST_FLAVOR TEST_ENVIRON \
-             PODBIN_NAME PRIV_NAME DISTRO_NV
+             PODBIN_NAME PRIV_NAME DISTRO_NV DEST_BRANCH
 
 # Verify basic dependencies
 for depbin in go rsync unzip sha256sum curl make python3 git