diff --git a/docs/testing/TESTBED_DOCKER_PROCEDURE.md b/docs/testing/TESTBED_DOCKER_PROCEDURE.md
index b35d876..5c753cc 100644
--- a/docs/testing/TESTBED_DOCKER_PROCEDURE.md
+++ b/docs/testing/TESTBED_DOCKER_PROCEDURE.md
@@ -31,17 +31,20 @@ the fixture-labeled Docker resources.
 Run from the repository root:
 
 ```bash
-cd /Users/jonathanlim/Documents/GitHub/DockerMap
+cd /path/to/DockerMap
 ```
 
+If you already have the repository open in a shell, stay in that repository
+root and run the commands from there.
+
 Confirm required tools are available:
 
 ```bash
 node --version
 npm --version
 cargo --version
-docker version
-docker compose version
+(docker version && docker compose version) || \
+  (sudo -n docker version && sudo -n docker compose version)
 curl --version
 ```
 
@@ -99,6 +102,7 @@ STATE_FILE="${TMPDIR:-/tmp}/dockermap-fixture-current.env"
 set -a
 source "$STATE_FILE"
 set +a
+IFS=' ' read -r -a DOCKER_CMD <<< "${DOCKER_CMD_TEXT:-docker}"
 ```
 
 For a custom state file:
@@ -108,6 +112,7 @@ STATE_FILE="/tmp/dockermap-testbed.env"
 set -a
 source "$STATE_FILE"
 set +a
+IFS=' ' read -r -a DOCKER_CMD <<< "${DOCKER_CMD_TEXT:-docker}"
 ```
 
 Confirm the recorded URLs:
@@ -124,7 +129,7 @@ The default state file is `${TMPDIR:-/tmp}/dockermap-fixture-current.env`.
 List the fixture containers:
 
 ```bash
-docker ps --filter "label=$LABEL_EXPR" \
+"${DOCKER_CMD[@]}" ps --filter "label=$LABEL_EXPR" \
   --format 'table {{.Names}}\t{{.Image}}\t{{.Status}}\t{{.Ports}}'
 ```
 
@@ -140,15 +145,15 @@ Expected:
 Confirm the unlabeled control container exists outside the label filter:
 
 ```bash
-docker ps --filter "name=$CONTROL_CONTAINER" \
+"${DOCKER_CMD[@]}" ps --filter "name=$CONTROL_CONTAINER" \
   --format 'table {{.Names}}\t{{.Status}}'
 ```
 
 List fixture networks and volumes:
 
 ```bash
-docker network ls --filter "label=$LABEL_EXPR"
-docker volume ls --filter "label=$LABEL_EXPR"
+"${DOCKER_CMD[@]}" network ls --filter "label=$LABEL_EXPR"
+"${DOCKER_CMD[@]}" volume ls --filter "label=$LABEL_EXPR"
 ```
 
 Expected networks:
@@ -349,9 +354,9 @@ The testbed pass is acceptable when:
 If a step fails, capture:
 
 ```bash
-docker ps -a --filter "label=$LABEL_EXPR"
-docker network ls --filter "label=$LABEL_EXPR"
-docker volume ls --filter "label=$LABEL_EXPR"
+"${DOCKER_CMD[@]}" ps -a --filter "label=$LABEL_EXPR"
+"${DOCKER_CMD[@]}" network ls --filter "label=$LABEL_EXPR"
+"${DOCKER_CMD[@]}" volume ls --filter "label=$LABEL_EXPR"
 tail -200 "$FIXTURE_DIR/logs/daemon.log"
 tail -200 "$FIXTURE_DIR/logs/api.log"
 tail -200 "$FIXTURE_DIR/logs/web.log"
@@ -380,9 +385,9 @@ scripts/dockermap-fixture-down.sh --state-file /tmp/dockermap-testbed.env
 Confirm no fixture-labeled resources remain:
 
 ```bash
-docker ps -a --filter "label=$LABEL_EXPR"
-docker network ls --filter "label=$LABEL_EXPR"
-docker volume ls --filter "label=$LABEL_EXPR"
+"${DOCKER_CMD[@]}" ps -a --filter "label=$LABEL_EXPR"
+"${DOCKER_CMD[@]}" network ls --filter "label=$LABEL_EXPR"
+"${DOCKER_CMD[@]}" volume ls --filter "label=$LABEL_EXPR"
 ```
 
 The teardown script removes DockerMap processes, the unlabeled control
diff --git a/scripts/dockermap-fixture-up.sh b/scripts/dockermap-fixture-up.sh
index a4eafed..57c042e 100755
--- a/scripts/dockermap-fixture-up.sh
+++ b/scripts/dockermap-fixture-up.sh
@@ -45,15 +45,15 @@ if [[ -e "$STATE_FILE" ]]; then
 fi
 
 detect_docker() {
-  if docker version --format '{{.Server.Version}}' >/dev/null 2>&1; then
+  if docker version --format '{{.Server.Version}}' >/dev/null 2>&1 && docker compose version >/dev/null 2>&1; then
     DOCKER_CMD=(docker)
     return
   fi
-  if sudo -n docker version --format '{{.Server.Version}}' >/dev/null 2>&1; then
+  if sudo -n docker version --format '{{.Server.Version}}' >/dev/null 2>&1 && sudo -n docker compose version >/dev/null 2>&1; then
     DOCKER_CMD=(sudo -n docker)
     return
   fi
-  echo "Docker is not reachable by the current user or sudo -n docker." >&2
+  echo "Docker and Docker Compose are not reachable together by the current user or sudo -n docker." >&2
   exit 2
 }