diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index 0295db5..cdf4e29 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -33,4 +33,4 @@ jobs:
                 | match("exercises/practice/([^/]+)/")
                 | .captures[0].string
               ) | unique[]
-          ' | xargs -r -L1 bin/test-one
+          ' | xargs -r -L1 bin/verify-exercises
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index afe6a13..56352bd 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -25,4 +25,4 @@ jobs:
 
       - name: test
         run: |
-          bin/test-all
+          bin/verify-exercises
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 560641f..1d98189 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -92,7 +92,7 @@
 1. Test it with
 
     ```sh
-    bin/test-one ${slug_name}
+    bin/verify-exercises ${slug_name}
     ```
 
 1. When you're satisfied with the solution, create the stub file `${slug_name}.moon`.
diff --git a/README.md b/README.md
index 134442e..02ae276 100644
--- a/README.md
+++ b/README.md
@@ -6,10 +6,10 @@ Exercism exercises in MoonScript.
 
 ## Testing
 
-To test all exercises, run `./bin/test-all`.
+To test all exercises, run `./bin/verify-exercises`.
 This command will iterate over all exercises and check to see if their exemplar/example implementation passes all the tests.
 
-To test a single exercise, run `./bin/test-one <exercise-slug>`.
+To test a single exercise, run `./bin/verify-exercises <exercise-slug>`.
 
 ### Using Docker
 
diff --git a/bin/add-practice-exercise b/bin/add-practice-exercise
index d097a86..66f284d 100755
--- a/bin/add-practice-exercise
+++ b/bin/add-practice-exercise
@@ -129,7 +129,7 @@ Your next steps are:
 
 2.  Create the example solution ==>  $(jq -r '.example' <<< "${files}")
 
-3.  Verify the example solution passes the tests ==>  $ bin/test-one ${slug}
+3.  Verify the example solution passes the tests ==>  $ bin/verify-exercises ${slug}
 
 4.  Create the stub solution ==>  $(jq -r '.solution' <<< "${files}")
 
diff --git a/bin/test-all b/bin/test-all
deleted file mode 100755
index f31d8c8..0000000
--- a/bin/test-all
+++ /dev/null
@@ -1,23 +0,0 @@
-#!/usr/bin/env bash
-
-start=$SECONDS
-
-unset CDPATH
-
-script_dir=$(realpath "$(dirname "$0")")
-
-cd "${script_dir}/../exercises/practice" || exit 4
-result=0
-count=0
-
-for exercise in *; do
-    [[ -d $exercise ]] || continue
-
-    "$script_dir"/test-one "$exercise" || (( ++result ))
-    (( ++count ))
-done
-
-echo
-echo "$count exercises tested in $(( SECONDS - start )) seconds."
-
-exit $result
diff --git a/bin/test-one b/bin/test-one
deleted file mode 100755
index e8ec430..0000000
--- a/bin/test-one
+++ /dev/null
@@ -1,39 +0,0 @@
-#!/usr/bin/env bash
-#
-# shellcheck disable=SC2164
-
-if [[ -z $1 ]]; then
-    echo "Usage: $0 exercise-slug" >&2
-    exit 2
-fi
-
-unset CDPATH
-
-cd "$(realpath "$(dirname "$0")/..")"
-
-exercise=$1
-shift
-exercise_dir=$(realpath "exercises/practice/$exercise")
-
-if [[ ! -d $exercise_dir ]]; then
-    echo "No such exercise: $exercise" >&2
-    exit 3
-fi
-
-test_dir=$( mktemp -d )
-trap 'rm -rf "$test_dir"' EXIT
-
-cd "$test_dir" || exit 4
-(cd "$exercise_dir"; tar cf - .) | tar xf -
-
-echo >&2
-echo "Testing $exercise..." >&2
-
-IFS=$'\t' read -r solution tests example < <(
-    jq -r '.files | [.solution[0], .test[0], .example[0]] | @tsv' .meta/config.json
-)
-
-mv "$example" "$solution"
-perl -i -pe 's/^\s+\Kpending\b/it/' "$tests"
-
-busted --verbose "$@"
diff --git a/bin/verify-exercises b/bin/verify-exercises
index 269a608..fc378b0 100755
--- a/bin/verify-exercises
+++ b/bin/verify-exercises
@@ -19,8 +19,6 @@ required_tool() {
         die "${1} is required but not installed. Please install it and make sure it's in your PATH."
 }
 
-required_tool jq
-
 copy_example_or_examplar_to_solution() {
     jq -c '[.files.solution, .files.exemplar // .files.example] | transpose | map({src: .[1], dst: .[0]}) | .[]' .meta/config.json \
     | while read -r src_and_dst; do
@@ -29,26 +27,13 @@ copy_example_or_examplar_to_solution() {
 }
 
 unskip_tests() {
-    jq -r '.files.test[]' .meta/config.json | while read -r test_file; do
-        noop # TODO: replace this with the command to unskip the tests.
-        # Note: this function runs from within an exercise directory.
-        # Note: the exercise directory is a temporary directory, so feel
-        # free to modify its (test) files as needed.
-        # Note: ignore this function if either:
-        #   - skipping tests is not supported, or
-        #   - skipping tests does not require modifying the test files.
-        # Example: sed -i 's/test.skip/test/g' "${test_file}"
-    done
+    local test_files
+    readarray -t test_files < <( jq -r '.files.test[]' .meta/config.json )
+    perl -i -pe 's/^\s+\Kpending\b/it/' "${test_files[@]}"
 }
 
 run_tests() {
-    noop # TODO: replace this with the command to run the tests for the exercise.
-    # Note: this function runs from within an exercise directory.
-    # Note: the exercise directory is a temporary directory, so feel
-    # free to modify its files as needed.
-    # Note: return a zero exit code if all tests pass, otherwise non-zero.
-    # Example: `npm test`
-    # Example: `python3 -m pytest two_fer_test.py`
+    busted --verbose
 }
 
 verify_exercise() {
@@ -89,5 +74,9 @@ verify_exercises() {
     ((count > 0)) || die 'no matching exercises found!'
 }
 
+required_tool jq
+required_tool perl
+required_tool busted
+
 exercise_slug="${1:-*}"
 verify_exercises "${exercise_slug}"
diff --git a/bin/verify-exercises-in-docker b/bin/verify-exercises-in-docker
index 6b238f2..584344e 100755
--- a/bin/verify-exercises-in-docker
+++ b/bin/verify-exercises-in-docker
@@ -11,17 +11,37 @@
 # Example: verify single exercise in Docker
 # bin/verify-exercises-in-docker two-fer
 
-set -eo pipefail
+set -euo pipefail
+
+image="exercism/moonscript-test-runner"
+
+usage() {
+    echo "Run exercise tests in the $image docker image."
+    echo "Specify an exercise slug to test that one, otherwise test all."
+    echo
+    echo "usage: $(basename "$0") [-h] [-L] [exercise-slug]"
+    echo "where:"
+    echo "  -L  Use a locally built image; default is to pull from a docker registry."
+    echo "      See https://github.com/$image"
+}
 
 die() { echo "$*" >&2; exit 1; }
 
+docker_local=false
+while getopts ":hL" opt; do
+    case $opt in
+        h) usage; exit ;;
+        L) docker_local=true ;;
+        ?) die "Unknown option -$OPTARG" ;;
+    esac
+done
+shift $((OPTIND - 1))
+
 required_tool() {
-    command -v "${1}" >/dev/null 2>&1 ||
-        die "${1} is required but not installed. Please install it and make sure it's in your PATH."
+    command -v "${1}" >/dev/null 2>&1 \
+    || die "${1} is required but not installed. Please install it and make sure it's in your PATH."
 }
 
-required_tool docker
-
 copy_example_or_examplar_to_solution() {
     jq -c '[.files.solution, .files.exemplar // .files.example] | transpose | map({src: .[1], dst: .[0]}) | .[]' .meta/config.json \
     | while read -r src_and_dst; do
@@ -30,8 +50,15 @@ copy_example_or_examplar_to_solution() {
 }
 
 pull_docker_image() {
-    docker pull exercism/moonscript-test-runner ||
-        die $'Could not find the `exercism/moonscript-test-runner` Docker image.\nCheck the test runner docs at https://exercism.org/docs/building/tooling/test-runners for more information.'
+    if $docker_local && docker image inspect "$image" >/dev/null 2>&1; then
+        echo "Using local image"
+        docker image ls "$image"
+    else
+        if ! docker pull "$image"; then
+            die "Could not find the '$image' Docker image.
+Check the test runner docs at https://exercism.org/docs/building/tooling/test-runners for more information."
+        fi
+    fi
 }
 
 run_tests() {
@@ -83,6 +110,9 @@ verify_exercises() {
     ((count > 0)) || die 'no matching exercises found!'
 }
 
+required_tool docker
+required_tool jq
+
 pull_docker_image
 
 exercise_slug="${1:-*}"