diff --git a/t/rose-task-run/45-app-fcm-make-compat_mode.t b/t/rose-task-run/45-app-fcm-make-compat_mode.t
new file mode 100755
index 0000000000..357c54be0d
--- /dev/null
+++ b/t/rose-task-run/45-app-fcm-make-compat_mode.t
@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+#-------------------------------------------------------------------------------
+# Copyright (C) British Crown (Met Office) & Contributors.
+#
+# This file is part of Rose, a framework for meteorological suites.
+#
+# Rose is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Rose is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Rose. If not, see <http://www.gnu.org/licenses/>.
+#-------------------------------------------------------------------------------
+# Compatibility Mode Test
+# Ensure that when Cylc Rose gets workflow config that
+# compatibility run mode isn't changed.
+# https://github.com/cylc/cylc-rose/issues/319
+#-------------------------------------------------------------------------------
+. "$(dirname "$0")/test_header"
+
+if ! fcm help make 1>/dev/null 2>&1; then
+    skip_all '"fcm make" unavailable'
+fi
+if ! gfortran --version 1>/dev/null 2>&1; then
+    skip_all '"gfortran" unavailable'
+fi
+JOB_HOST="$(rose config --default= 't' 'job-host')"
+if [[ -n "${JOB_HOST}" ]]; then
+    JOB_HOST="$(rose host-select -q "${JOB_HOST}")"
+fi
+if [[ -z "${JOB_HOST}" ]]; then
+    skip_all '"[t]job-host" not defined or not available'
+fi
+
+tests 2
+export ROSE_CONF_PATH=
+get_reg
+
+run_pass "${TEST_KEY_BASE}-install" \
+    cylc install \
+        --workflow-name="${FLOW}" \
+        --no-run-name \
+        -S "HOST='${JOB_HOST}'" \
+        "${TEST_SOURCE_DIR}/${TEST_KEY_BASE}"
+
+run_pass "${TEST_KEY_BASE}-play" \
+    timeout 120 \
+        cylc play \
+            "${FLOW}" \
+            --abort-if-any-task-fails \
+            --host='localhost' \
+            --no-detach \
+            --debug
+
+purge
+exit 0
diff --git a/t/rose-task-run/45-app-fcm-make-compat_mode/app/make/file/fcm-make.cfg b/t/rose-task-run/45-app-fcm-make-compat_mode/app/make/file/fcm-make.cfg
new file mode 100644
index 0000000000..4fef0b8dd2
--- /dev/null
+++ b/t/rose-task-run/45-app-fcm-make-compat_mode/app/make/file/fcm-make.cfg
@@ -0,0 +1,6 @@
+steps=extract mirror
+extract.ns=foo
+extract.location[foo]=$HERE/src
+mirror.prop{config-file.steps}=build
+build.target{task}=link
+build.prop{file-ext.bin}=
diff --git a/t/rose-task-run/45-app-fcm-make-compat_mode/app/make/file/src/hello.f90 b/t/rose-task-run/45-app-fcm-make-compat_mode/app/make/file/src/hello.f90
new file mode 100644
index 0000000000..b43411d851
--- /dev/null
+++ b/t/rose-task-run/45-app-fcm-make-compat_mode/app/make/file/src/hello.f90
@@ -0,0 +1,3 @@
+program hello
+write(*, '(a)') 'Hello World!'
+end program hello
diff --git a/t/rose-task-run/45-app-fcm-make-compat_mode/app/make/rose-app.conf b/t/rose-task-run/45-app-fcm-make-compat_mode/app/make/rose-app.conf
new file mode 100644
index 0000000000..ba8c7f27e6
--- /dev/null
+++ b/t/rose-task-run/45-app-fcm-make-compat_mode/app/make/rose-app.conf
@@ -0,0 +1,4 @@
+meta=fcm_make
+mode=fcm_make
+make-name-cont=-bin
+orig-cont-map=make:make-bin
diff --git a/t/rose-task-run/45-app-fcm-make-compat_mode/app/run/rose-app.conf b/t/rose-task-run/45-app-fcm-make-compat_mode/app/run/rose-app.conf
new file mode 100644
index 0000000000..e9110daaf6
--- /dev/null
+++ b/t/rose-task-run/45-app-fcm-make-compat_mode/app/run/rose-app.conf
@@ -0,0 +1,2 @@
+[command]
+default=hello >"${ROSE_SUITE_DIR}/share/hello.txt"
diff --git a/t/rose-task-run/45-app-fcm-make-compat_mode/rose-suite.conf b/t/rose-task-run/45-app-fcm-make-compat_mode/rose-suite.conf
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/t/rose-task-run/45-app-fcm-make-compat_mode/suite.rc b/t/rose-task-run/45-app-fcm-make-compat_mode/suite.rc
new file mode 100644
index 0000000000..3a2786c64b
--- /dev/null
+++ b/t/rose-task-run/45-app-fcm-make-compat_mode/suite.rc
@@ -0,0 +1,17 @@
+#!jinja2
+[cylc]
+    UTC mode = True
+[scheduling]
+    [[dependencies]]
+        graph = """
+            hello-make:finish & hello-make => fin
+        """
+
+[runtime]
+    [[hello-make]]
+        script = rose task-run --app-key=make --new
+    [[hello-make-bin]]
+        script = rose task-run --app-key=make
+        [[[remote]]]
+            host = {{HOST}}
+    [[fin]]