diff --git a/tests/test_versions/Makefile b/tests/test_versions/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..8bebd1c7dc24a69cb37af9a620fd2eef47bda0d1
--- /dev/null
+++ b/tests/test_versions/Makefile
@@ -0,0 +1,19 @@
+
+.PHONY: default
+default: test
+
+.PHONY: test
+test: check_env clean
+ @./test.sh test.txt
+
+.PHONY: check_env
+check_env: guard-EPICS_BASE guard-E3_REQUIRE_VERSION
+ @#$(or $(wildcard ${EPICS_BASE}/require/${E3_REQUIRE_VERSION}/bin/setE3Env.bash), $(error setE3Env.bash not found. Please check your version of base and require.))
+
+guard-%:
+ @#$(or ${$*}, $(error $* is not set))
+
+.PHONY: clean
+clean:
+ rm -rf test/cellMods
+ rm -rf test/testversions/O.*
diff --git a/tests/test_versions/test.sh b/tests/test_versions/test.sh
new file mode 100755
index 0000000000000000000000000000000000000000..64eaac9668278c0093ef195aac3998740dd05b0d
--- /dev/null
+++ b/tests/test_versions/test.sh
@@ -0,0 +1,173 @@
+#!/usr/bin/env bash
+
+# Defaults
+LOGFILE=test.log
+MODULENAME=testversions
+EPICS_BASE=${EPICS_BASE:-/epics/base-7.0.5}
+REQUIRE_VER=${E3_REQUIRE_VERSION:-3.4.1}
+
+
+if which ack &> /dev/null ; then
+ __SEARCH_COMMAND__="ack --passthru"
+else
+ echo "ack is not installed; defaulting to grep, but note that the log will be missing the IOC log" >&2
+ __SEARCH_COMMAND__=grep
+fi
+
+function usage {
+ echo "Usage:"
+ echo " bash test.sh [-b <EPICS_BASE>] [-r <REQUIRE_VER>] [-h] testfile"
+ exit 0
+}
+
+function show_header {
+ echo "Testing require version loader"
+ echo "============================================================"
+ echo -e "EPICS base: \033[34m${EPICS_BASE}\033[0m"
+ echo -e "Require version: \033[34m${REQUIRE_VER}\033[0m"
+ echo "============================================================"
+}
+
+function install_vers
+{
+ for ver in $@; do
+ echo "=========================================="
+ echo "Installing local version version '$ver'"
+ echo "=========================================="
+ make -C test clean cellinstall __DEBUG_VERSION=$ver __EPICS_BASE_LOCATION="$EPICS_BASE" __REQUIRE_VERSION="$REQUIRE_VER" E3_NO_TEST=true
+ done
+}
+
+function clean_vers
+{
+ rm -rf test/cellMods
+}
+
+function test_require
+{
+ if [ "$#" -lt "3" ]; then
+ usage
+ return
+ fi
+
+ required=$1
+ shift
+ expected=$1
+ shift
+ args=$@
+
+ if [ "$required" = "-" ]; then
+ req_str="$MODULENAME"
+ else
+ req_str="$MODULENAME,$required"
+ fi
+
+ echo "============================================================"
+ echo "Running test case:"
+ echo "Requested: $required"
+ echo "Expected: $expected"
+ echo "Installed: $args"
+ echo "============================================================"
+
+ required=$(sed 's/+/\\+/g' <<< $required)
+ expected=$(sed 's/+/\\+/g' <<< $expected)
+
+ clean_vers
+
+ install_vers $args
+
+ echo "=========================================="
+ echo "Running iocsh.bash -l cellMods -r $req_str"
+ echo "=========================================="
+
+ iocsh_args="-l test/cellMods -c 'var requireDebug 1' -r $req_str"
+
+ if [ "$expected" = "-" ]; then
+ search_string="^Module $MODULENAME (not available|version $required not available|version $required not available \(but other versions are available\))\$"
+ else
+ search_string="^Loaded $MODULENAME version $expected\$"
+ fi
+
+ # The funny sed command here is from https://unix.stackexchange.com/a/235016/445931
+ # The reason this is needed is because the "Starting iocInit" message seems to be threaded
+ # differently than the regular flow of output and sometimes will separate the strings that
+ # we are looking for. If we simply cut it out then we seem to be able to more consistently
+ # get meaningful tests.
+ echo exit | eval iocsh.bash "$iocsh_args" | \
+ sed -e '1h;2,$H;$!d;g' -e 's/Starting iocInit\niocRun: All initialization complete\n//' | \
+ $__SEARCH_COMMAND__ "${search_string}"
+}
+
+function format_output {
+ result=$1
+ shift
+ requested=$1
+ shift
+ expected=$1
+ shift
+ versions=$@
+
+ if [ "$result" = "0" ]; then
+ result_str="\033[32mpassed\033[0m"
+ else
+ result_str="\033[31mfailed\033[0m"
+ fi
+
+ printf "Test: $result_str\n"
+ printf "requested: %-20s expected: %-20s\n" "$requested" "$expected"
+ printf "Given versions: %s\n" "$versions"
+ printf "============================================================\n"
+}
+
+while getopts "hb:r:c:" opt; do
+ case $opt in
+ b) EPICS_BASE="$OPTARG"
+ ;;
+ r) REQUIRE_VER="$OPTARG"
+ ;;
+ c) COMMAND="$OPTARG"
+ ;;
+ h) HELP=true
+ ;;
+ *)
+ usage
+ exit 1
+ esac
+done
+shift $((OPTIND-1))
+TESTFILE=$1
+
+if [ "$HELP" = true ]; then
+ usage
+ exit 0
+fi
+
+rm -f "$LOGFILE"
+
+ENV_SRC="$EPICS_BASE/require/$REQUIRE_VER/bin/setE3Env.bash"
+if [ ! -f "$ENV_SRC" ]; then
+ echo "setE3Env.bash not found at location $ENV_SRC" >&2
+ exit 1
+fi
+source "$ENV_SRC" &> /dev/null
+
+show_header
+
+failed_tests=0
+if [ -n "$COMMAND" ]; then
+ test_require $COMMAND &>> "$LOGFILE"
+ result=$?
+ [ "$result" = 0 ] || ((failed_tests++))
+ format_output $result $COMMAND
+fi
+
+if [ -f "$TESTFILE" ]; then
+ while read -r line; do
+ test_require $line &>> "$LOGFILE"
+ result=$?
+ [ "$result" = 0 ] || ((failed_tests++))
+ format_output $result $line
+ done < <(sed -e 's/[[:space:]]*#.*//; /^[[:space:]]*$/d' "$TESTFILE")
+fi
+
+[ "$failed_tests" = 0 ]
diff --git a/tests/test_versions/test.txt b/tests/test_versions/test.txt
new file mode 100644
index 0000000000000000000000000000000000000000..8e5c2ac2c75f71694ddf28742472f4922078539a
--- /dev/null
+++ b/tests/test_versions/test.txt
@@ -0,0 +1,35 @@
+# Basic set of tests.
+#
+# Note that the first entry is the requested test version (- means none requested)
+# The second entry is what is expected to be loaded (- means it is expected to fail)
+# The third and other entries are the versions to install.
+
+# It should succesfully load a test version
+test test test 0.0.1
+
+# It should prioritize a numeric version over a test one
+- 0.0.1+0 test 0.0.1
+- 0.0.1+0 0.0.1 test
+
+# If no version is specified, it should load the highest numeric version
+- 0.0.1+7 0.0.1 0.0.1+7 0.0.1+3
+
+# If no build number is specified, it should load the highest build number
+0.0.1 0.0.1+4 0.0.1 0.0.1+4
+
+# Build number 0 means load that version.
+0.0.1+0 0.0.1+0 0.0.1 0.0.1+1
+0.0.1+0 0.0.1+0 0.0.1+0
+
+# Only load exactly the given build number if specified.
+0.0.1+0 - 0.0.1+1
+
+# 1-test counts as a test version
+- 0.0.1+0 0.0.1 1-test
+
+0.0.1 0.0.1+0 0.0.1 0.0.1+test
+
+0.0.1 0.0.1+0 0.0.1+test 0.0.1
+
+# A numeric version should be prioritized over a "higher" test version
+- 0.1.0+0 0.1.0 0.2.0-rc1
diff --git a/tests/test_versions/test/Makefile b/tests/test_versions/test/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..8bac5608ed123b17485362306dfafbe966942382
--- /dev/null
+++ b/tests/test_versions/test/Makefile
@@ -0,0 +1,53 @@
+#
+# Copyright (c) 2019 - 2020, European Spallation Source ERIC
+#
+# The program 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 2 of the
+# License, or any newer version.
+#
+# This program 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
+# this program. If not, see https://www.gnu.org/licenses/gpl-2.0.txt
+#
+#
+# Author : Simon Rose
+# email : simon.rose@ess.eu
+# Date : 2020-08-24
+# version : 0.0.0
+
+TOP:=$(CURDIR)
+
+# To configure require
+EPICS_BASE:=$(__EPICS_BASE_LOCATION)
+E3_REQUIRE_VERSION:=$(__REQUIRE_VERSION)
+
+E3_REQUIRE_LOCATION := $(EPICS_BASE)/require/$(E3_REQUIRE_VERSION)
+REQUIRE_CONFIG := $(E3_REQUIRE_LOCATION)/configure
+
+# To configure the modules
+EPICS_MODULE_NAME:=testversions
+E3_MODULE_VERSION:=$(__DEBUG_VERSION)
+E3_MODULE_NAME:=$(EPICS_MODULE_NAME)
+E3_MODULE_SRC_PATH:=$(EPICS_MODULE_NAME)
+E3_MODULE_MAKEFILE:=$(EPICS_MODULE_NAME).Makefile
+
+include $(REQUIRE_CONFIG)/CONFIG
+include $(REQUIRE_CONFIG)/RULES_SITEMODS
+
+default: test
+
+.PHONY: db
+db:
+
+#.PHONY: test
+#test:
+#
+#.PHONY: clean
+#clean:
+# rm -rf cellMods
+# rm -rf $(E3_MODULE_SRC_PATH)/O.*
\ No newline at end of file
diff --git a/tests/test_versions/test/testversions.Makefile b/tests/test_versions/test/testversions.Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..62a01b97b0354e9d280ef007f954e95ef915e485
--- /dev/null
+++ b/tests/test_versions/test/testversions.Makefile
@@ -0,0 +1,5 @@
+where_am_I := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
+include $(E3_REQUIRE_TOOLS)/driver.makefile
+
+DBDS += ./test.dbd
+
diff --git a/tests/test_versions/test/testversions/test.dbd b/tests/test_versions/test/testversions/test.dbd
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/tests/test_versions/test/testversions/testversions.Makefile b/tests/test_versions/test/testversions/testversions.Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..62a01b97b0354e9d280ef007f954e95ef915e485
--- /dev/null
+++ b/tests/test_versions/test/testversions/testversions.Makefile
@@ -0,0 +1,5 @@
+where_am_I := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
+include $(E3_REQUIRE_TOOLS)/driver.makefile
+
+DBDS += ./test.dbd
+