diff --git a/.travis.yml b/.travis.yml
index 5c8049aada..55b34ae422 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -72,13 +72,6 @@ jobs:
         FILE_ENV="./ci/test/00_setup_env_arm.sh"
         QEMU_USER_CMD=""
 
-    - stage: test
-      name: 'S390x  [GOAL: install]  [buster]  [unit tests, functional tests]'
-      arch: s390x  # Can disable QEMU_USER_CMD and run the tests natively without qemu
-      env: >-
-        FILE_ENV="./ci/test/00_setup_env_s390x.sh"
-        QEMU_USER_CMD=""
-
     - stage: test
       name: 'Win64  [GOAL: deploy]  [unit tests, no gui, no boost::process, no functional tests]'
       env: >-
diff --git a/ci/test/00_setup_env_s390x.sh b/ci/test/00_setup_env_s390x.sh
index fe330920d0..accbd07e22 100644
--- a/ci/test/00_setup_env_s390x.sh
+++ b/ci/test/00_setup_env_s390x.sh
@@ -20,6 +20,7 @@ fi
 export CONTAINER_NAME=ci_s390x
 export DOCKER_NAME_TAG="debian:buster"
 export RUN_UNIT_TESTS=true
+export TEST_RUNNER_ENV="LC_ALL=C"
 export RUN_FUNCTIONAL_TESTS=true
 export GOAL="install"
 export BITCOIN_CONFIG="--enable-reduce-exports --with-incompatible-bdb --with-boost-process"
diff --git a/ci/test/06_script_b.sh b/ci/test/06_script_b.sh
index 607a2820dd..87e9f31d0f 100755
--- a/ci/test/06_script_b.sh
+++ b/ci/test/06_script_b.sh
@@ -23,13 +23,13 @@ fi
 
 if [ "$RUN_UNIT_TESTS" = "true" ]; then
   BEGIN_FOLD unit-tests
-  DOCKER_EXEC DIR_UNIT_TEST_DATA=${DIR_UNIT_TEST_DATA} LD_LIBRARY_PATH=$DEPENDS_DIR/$HOST/lib make $MAKEJOBS check VERBOSE=1
+  DOCKER_EXEC ${TEST_RUNNER_ENV} DIR_UNIT_TEST_DATA=${DIR_UNIT_TEST_DATA} LD_LIBRARY_PATH=$DEPENDS_DIR/$HOST/lib make $MAKEJOBS check VERBOSE=1
   END_FOLD
 fi
 
 if [ "$RUN_UNIT_TESTS_SEQUENTIAL" = "true" ]; then
   BEGIN_FOLD unit-tests-seq
-  DOCKER_EXEC DIR_UNIT_TEST_DATA=${DIR_UNIT_TEST_DATA} LD_LIBRARY_PATH=$DEPENDS_DIR/$HOST/lib "${BASE_BUILD_DIR}/bitcoin-*/src/test/test_bitcoin*" --catch_system_errors=no -l test_suite
+  DOCKER_EXEC ${TEST_RUNNER_ENV} DIR_UNIT_TEST_DATA=${DIR_UNIT_TEST_DATA} LD_LIBRARY_PATH=$DEPENDS_DIR/$HOST/lib "${BASE_BUILD_DIR}/bitcoin-*/src/test/test_bitcoin*" --catch_system_errors=no -l test_suite
   END_FOLD
 fi