diff --git a/integration_test/helper.sh b/integration_test/helper.sh
index 22f41a5e..4d540037 100644
--- a/integration_test/helper.sh
+++ b/integration_test/helper.sh
@@ -16,43 +16,36 @@ function compile_file() {
     erlc -o "$output_dir" "$erl_file"
 }
 
-function contains() {
-    local pipeline='cat -'
+function contains_all() {
+    local output="$(cat -)"
+    local ret= acc=0
     for pattern in "$@"; do
-        pipeline+=" | tee >(grep -q -e \"$pattern\"; echo \"+\$?\")"
+        ret="$(echo "$output" | grep -L -e "$pattern" | wc -l)"
+        if [ "$ret" -ne "0" ]; then
+            [ "$(($acc))" -eq "0" ] && {
+                echo "contains_all FAILED"
+                echo "stdin: '${output}'"; }
+            echo "pattern is missing: '${pattern}'"
+        fi >&2
+        acc+="+${ret}"
     done
-    pipeline+=' >/dev/null'
-    local output="$(eval "$pipeline")"
-    test "$(($output))" -eq 0
+    test "$(($acc))" -eq 0
 }
 
-function doesnt_contain() {
-    local pipeline='cat -'
+function doesnt_contain_any() {
+    local output="$(cat -)"
+    local ret= acc=0
     for pattern in "$@"; do
-        pipeline+=" | tee >(grep -q -v -e \"$pattern\"; echo \"+\$?\")"
+        ret="$(echo "$output" | grep -l -e "$pattern" | wc -l || true)"
+        if [ "$ret" -ne "0" ]; then
+            [ "$(($acc))" -eq "0" ] && {
+                echo "doesnt_contain_any FAILED"
+                echo "stdin: '${output}'"; }
+            echo "pattern is present: '${pattern}'"
+        fi >&2
+        acc+="+${ret}"
     done
-    pipeline+=' >/dev/null'
-    local output="$(eval "$pipeline")"
-    test "$(($output))" -eq 0
-}
-
-function wait_for_cmd() {
-    local timeout="${1:-0}"
-    local cmd="${2:-true}"
-    shift 2
-    local full_cmd=("$cmd" "$@")
-    echo "Waiting for '${full_cmd[@]}'"
-    for i in $(seq 0 "${timeout}"); do
-        if "${full_cmd[@]}"; then
-            [ "$i" -ne 0 ] && echo
-            echo "Waiting is done after $i seconds"
-            return 0
-        fi
-        echo -n "."
-        sleep 1
-    done
-    echo -e "\nKilled by timeout"
-    return 1
+    test "$(($acc))" -eq 0
 }
 
 ######################
@@ -70,15 +63,6 @@ function amoc_eval() {
     docker_compose exec -T "$service" "$exec_path" eval "$@"
 }
 
-function container_is_healthy() {
-   docker_compose ps $1 | contains "healthy"
-}
-
-function wait_for_healthcheck() {
-    local container=$1
-    wait_for_cmd 60 container_is_healthy "$container"
-}
-
 ######################
 ## common variables ##
 ######################
diff --git a/integration_test/start_test_cluster.sh b/integration_test/start_test_cluster.sh
index 344ad9b4..c5b78d11 100755
--- a/integration_test/start_test_cluster.sh
+++ b/integration_test/start_test_cluster.sh
@@ -6,8 +6,4 @@ enable_strict_mode
 compile_file integration_test/extra_code_paths/path1/dummy_helper.erl
 compile_file integration_test/extra_code_paths/path2/dummy_scenario.erl
 
-docker_compose up -d amoc-{master,worker-1,worker-2}
-
-wait_for_healthcheck amoc-master
-wait_for_healthcheck amoc-worker-1
-wait_for_healthcheck amoc-worker-2
+docker_compose up --wait --wait-timeout 100 amoc-{master,worker-1,worker-2}
diff --git a/integration_test/test_add_new_node.sh b/integration_test/test_add_new_node.sh
index 3cde287c..fa38b99c 100755
--- a/integration_test/test_add_new_node.sh
+++ b/integration_test/test_add_new_node.sh
@@ -3,10 +3,9 @@
 source "$(dirname "$0")/helper.sh"
 enable_strict_mode
 
-docker_compose up -d amoc-worker-3
-wait_for_healthcheck amoc-worker-3
+docker_compose up --wait --wait-timeout 100 amoc-worker-3
 
-amoc_eval amoc-worker-3 "amoc_controller:get_status()." | contains dummy_scenario running
-amoc_eval amoc-worker-3 "binary_to_list(amoc_config:get(test))." | contains "test_value"
-amoc_eval amoc-worker-3 "dummy_helper:test_amoc_dist()." | contains 'amoc_dist_works_as_expected'
+amoc_eval amoc-worker-3 "amoc_controller:get_status()." | contains_all dummy_scenario running
+amoc_eval amoc-worker-3 "binary_to_list(amoc_config:get(test))." | contains_all "test_value"
+amoc_eval amoc-worker-3 "dummy_helper:test_amoc_dist()." | contains_all 'amoc_dist_works_as_expected'
 echo "amoc_dist_works_as_expected"
diff --git a/integration_test/test_amoc_cluster.sh b/integration_test/test_amoc_cluster.sh
index 99bc5da7..7666de6a 100755
--- a/integration_test/test_amoc_cluster.sh
+++ b/integration_test/test_amoc_cluster.sh
@@ -4,14 +4,14 @@ source "$(dirname "$0")/helper.sh"
 enable_strict_mode
 
 echo "checking that clustering is done properly"
-amoc_eval amoc-master "nodes()." | contains amoc-worker-1 amoc-worker-2
-amoc_eval amoc-worker-1 "nodes()." | contains amoc-master amoc-worker-2
-amoc_eval amoc-worker-2 "nodes()." | contains amoc-master amoc-worker-1
+amoc_eval amoc-master "nodes()." | contains_all amoc-worker-1 amoc-worker-2
+amoc_eval amoc-worker-1 "nodes()." | contains_all amoc-master amoc-worker-2
+amoc_eval amoc-worker-2 "nodes()." | contains_all amoc-master amoc-worker-1
 
-echo "checking that AMOC_EXTRA_CODE_PATHS setting works as expected"
-amoc_eval amoc-master "amoc_code_server:list_scenario_modules()." | contains dummy_scenario
-amoc_eval amoc-master "amoc_code_server:list_configurable_modules()." | contains dummy_helper
-amoc_eval amoc-worker-1 "amoc_code_server:list_scenario_modules()." | doesnt_contain dummy_scenario
-amoc_eval amoc-worker-1 "amoc_code_server:list_configurable_modules()." | doesnt_contain dummy_helper
-amoc_eval amoc-worker-2 "amoc_code_server:list_scenario_modules()." | doesnt_contain dummy_scenario
-amoc_eval amoc-worker-2 "amoc_code_server:list_configurable_modules()." | doesnt_contain dummy_helper
+echo "checking that setting AMOC_EXTRA_CODE_PATHS env works as expected"
+amoc_eval amoc-master "amoc_code_server:list_scenario_modules()." | contains_all dummy_scenario
+amoc_eval amoc-master "amoc_code_server:list_configurable_modules()." | contains_all dummy_helper
+amoc_eval amoc-worker-1 "amoc_code_server:list_scenario_modules()." | doesnt_contain_any dummy_scenario
+amoc_eval amoc-worker-1 "amoc_code_server:list_configurable_modules()." | doesnt_contain_any dummy_helper
+amoc_eval amoc-worker-2 "amoc_code_server:list_scenario_modules()." | doesnt_contain_any dummy_scenario
+amoc_eval amoc-worker-2 "amoc_code_server:list_configurable_modules()." | doesnt_contain_any dummy_helper
diff --git a/integration_test/test_distribute_scenario.sh b/integration_test/test_distribute_scenario.sh
index 57ebcf1f..9264ccc1 100755
--- a/integration_test/test_distribute_scenario.sh
+++ b/integration_test/test_distribute_scenario.sh
@@ -56,21 +56,21 @@ function distribute_modules() {
     amoc_eval "${1}" "amoc_code_server:distribute_modules('amoc@${2}')."
 }
 
-ensure_modules_loaded amoc-master "${modules[@]}" | contains "${modules[@]}"
-ensure_modules_loaded amoc-worker-1 "${modules[@]}" | doesnt_contain "${modules[@]}"
-ensure_modules_loaded amoc-worker-2 "${modules[@]}" | doesnt_contain "${modules[@]}"
+ensure_modules_loaded amoc-master "${modules[@]}" | contains_all "${modules[@]}"
+ensure_modules_loaded amoc-worker-1 "${modules[@]}" | doesnt_contain_any "${modules[@]}"
+ensure_modules_loaded amoc-worker-2 "${modules[@]}" | doesnt_contain_any "${modules[@]}"
 
-list_scenarios_and_helpers amoc-worker-2 | doesnt_contain "${modules[@]}"
-list_scenarios_and_helpers amoc-worker-1 | doesnt_contain "${modules[@]}"
+list_scenarios_and_helpers amoc-worker-2 | doesnt_contain_any "${modules[@]}"
+list_scenarios_and_helpers amoc-worker-1 | doesnt_contain_any "${modules[@]}"
 
 echo "Distributing scenario and helper module from the amoc-master node"
 ## amoc_controller is added to the list as an example of module
 ## that already exists on all the slave amoc nodes
 add_module amoc-master "${modules[@]}" amoc_controller
-distribute_modules amoc-master amoc-worker-1 | contains "${modules[@]}" amoc_controller
+distribute_modules amoc-master amoc-worker-1 | contains_all "${modules[@]}" amoc_controller
 
-ensure_modules_loaded amoc-worker-1 "${modules[@]}" | contains "${modules[@]}"
-ensure_modules_loaded amoc-worker-2 "${modules[@]}" | doesnt_contain "${modules[@]}"
+ensure_modules_loaded amoc-worker-1 "${modules[@]}" | contains_all "${modules[@]}"
+ensure_modules_loaded amoc-worker-2 "${modules[@]}" | doesnt_contain_any "${modules[@]}"
 
-list_scenarios_and_helpers amoc-worker-1 | contains "${modules[@]}"
-list_scenarios_and_helpers amoc-worker-2 | doesnt_contain "${modules[@]}"
+list_scenarios_and_helpers amoc-worker-1 | contains_all "${modules[@]}"
+list_scenarios_and_helpers amoc-worker-2 | doesnt_contain_any "${modules[@]}"
diff --git a/integration_test/test_run_scenario.sh b/integration_test/test_run_scenario.sh
index c5735dbb..bd2caf90 100755
--- a/integration_test/test_run_scenario.sh
+++ b/integration_test/test_run_scenario.sh
@@ -14,7 +14,7 @@ result="$(run_scenario amoc-master dummy_scenario 10)"
 
 echo "$result"
 
-if echo "$result" | contains "ok" "'amoc@amoc-worker-1'" "'amoc@amoc-worker-2'" ; then
+if echo "$result" | contains_all "ok" "'amoc@amoc-worker-1'" "'amoc@amoc-worker-2'" ; then
     echo "Scenario executed"
     exit 0
 else
diff --git a/src/amoc_config/amoc_config_parser.erl b/src/amoc_config/amoc_config_parser.erl
index 52a61815..f91a2bbb 100644
--- a/src/amoc_config/amoc_config_parser.erl
+++ b/src/amoc_config/amoc_config_parser.erl
@@ -9,13 +9,9 @@
 
 -export([parse_value/1]).
 
--ifdef(TEST).
-%% exported for testing only
+%% format/2 is exported for testing purposes
+%% it is also re-used by amoc-arsenal
 -export([format/2]).
--else.
--ignore_xref([format/2]).
--dialyzer({nowarn_function, [format/2]}).
--endif.
 
 %% ------------------------------------------------------------------
 %% API