diff --git a/tests/minikube-test-environment.bats b/tests/minikube-test-environment.bats
new file mode 100644
index 0000000..72cd2c6
--- /dev/null
+++ b/tests/minikube-test-environment.bats
@@ -0,0 +1,62 @@
+#!/usr/bin/env bats
+# SUR-2184: shallow coverage for bash/minikube-test-environment — help output,
+# env defaults, unknown-command path, and stubbed external tools (PATH prefix)
+# mirroring tests/kind-test-environment.bats hermetic style.
+
+setup() {
+  load 'helpers.bash'
+  helpers::isolate_home
+  STUB_BIN=$(mktemp -d)
+  MINIKUBE_ARGV_LOG=$(mktemp)
+  cat >"$STUB_BIN/minikube" <<'STUB_EOF'
+#!/usr/bin/env bash
+printf '%s\n' "$@" >>"$MINIKUBE_ARGV_LOG"
+exit 0
+STUB_EOF
+  for stub_name in kubectl helm jq daemonize; do
+    printf '%s\n' '#!/usr/bin/env bash' 'exit 0' >"$STUB_BIN/$stub_name"
+    chmod +x "$STUB_BIN/$stub_name"
+  done
+  chmod +x "$STUB_BIN/minikube"
+  PATH="$STUB_BIN:$PATH"
+  export STUB_BIN MINIKUBE_ARGV_LOG PATH
+  MK_ENV="$REPO_ROOT/bash/minikube-test-environment"
+}
+
+teardown() {
+  rm -rf "$STUB_BIN"
+  rm -f "$MINIKUBE_ARGV_LOG"
+}
+
+@test "help lists defaults including MINIKUBE_DRIVER=docker" {
+  run "$MK_ENV" help
+  [ "$status" -eq 0 ]
+  [[ "$output" == *"MINIKUBE_DRIVER=docker"* ]]
+  [[ "$output" == *"KUBERNETES_VERSION="* ]]
+  [[ "$output" == *create* ]] && [[ "$output" == *stop* ]] && [[ "$output" == *delete* ]]
+}
+
+@test "help reflects MINIKUBE_DRIVER override from the environment" {
+  run env MINIKUBE_DRIVER=podman "$MK_ENV" help
+  [ "$status" -eq 0 ]
+  [[ "$output" == *"MINIKUBE_DRIVER=podman"* ]]
+}
+
+@test "bare invocation runs help" {
+  run "$MK_ENV"
+  [ "$status" -eq 0 ]
+  [[ "$output" == *"MINIKUBE_DRIVER=docker"* ]]
+}
+
+@test "unknown command exits 1 and prints allowed commands" {
+  run "$MK_ENV" not-a-command
+  [ "$status" -eq 1 ]
+  [[ "$output" == *"Unknown command"* ]]
+  [[ "$output" == *create* ]] && [[ "$output" == *stop* ]] && [[ "$output" == *delete* ]]
+}
+
+@test "stop invokes minikube stop with stubs on PATH" {
+  run env "PATH=$PATH" "MINIKUBE_ARGV_LOG=$MINIKUBE_ARGV_LOG" "$MK_ENV" stop
+  [ "$status" -eq 0 ]
+  grep -qx 'stop' "$MINIKUBE_ARGV_LOG"
+}
diff --git a/tests/on-change.bats b/tests/on-change.bats
new file mode 100644
index 0000000..16d23ec
--- /dev/null
+++ b/tests/on-change.bats
@@ -0,0 +1,75 @@
+#!/usr/bin/env bats
+# SUR-2179: regression coverage for bash/on-change — options, defaults,
+# post-`--` argv to the watched command, and stable error paths (no wall-clock
+# assertions on the polling loop itself).
+
+setup() {
+  load 'helpers.bash'
+  helpers::isolate_home
+  ONCHANGE="$REPO_ROOT/bash/on-change"
+}
+
+@test "bare invocation prints syntax and exits 1" {
+  run "$ONCHANGE"
+  [ "$status" -eq 1 ]
+  [[ "$output" == *SYNTAX* ]] || [[ "$output" == *OPTIONS* ]]
+}
+
+@test "-h prints help and exits 1" {
+  run "$ONCHANGE" -h
+  [ "$status" -eq 1 ]
+  [[ "$output" == *SYNTAX* ]] || [[ "$output" == *OPTIONS* ]]
+  [[ "$output" == *"-W"* ]] && [[ "$output" == *"-w"* ]] && [[ "$output" == *"-t"* ]]
+}
+
+@test "missing WorkingDir surfaces not-found error" {
+  watch_dir=$(mktemp -d)
+  run "$ONCHANGE" -W "$watch_dir" -w "/no/such/working/dir" -t 9 -- true
+  rm -rf "$watch_dir"
+  [ "$status" -eq 1 ]
+  [[ "$output" == *"/no/such/working/dir not found"* ]]
+}
+
+@test "WorkingDir defaults to WatchDir when -w is omitted" {
+  watch_dir=$(mktemp -d)
+  touch "$watch_dir/seed"
+  argv_log=$(mktemp)
+  stub_bin=$(mktemp -d)
+  cat >"$stub_bin/record_argv" <<EOF
+#!/usr/bin/env bash
+printf '%s\n' "\$@" >>"$argv_log"
+EOF
+  chmod +x "$stub_bin/record_argv"
+  (
+    sleep 0.4
+    echo trigger >>"$watch_dir/marker"
+  ) &
+  run env PATH="$stub_bin:$PATH" timeout 8s "$ONCHANGE" -W "$watch_dir" -t 1 -v -v -- "$stub_bin/record_argv" ok
+  [[ "$output" == *"Working directory $watch_dir"* ]]
+  [[ "$output" == *"Watching directory $watch_dir"* ]]
+  [[ "$output" == *"Polling interval 1"* ]]
+  grep -qx 'ok' "$argv_log"
+  rm -rf "$watch_dir" "$stub_bin"
+  rm -f "$argv_log"
+}
+
+@test "argv after -- is passed unchanged to the invoked command" {
+  watch_dir=$(mktemp -d)
+  touch "$watch_dir/seed"
+  argv_log=$(mktemp)
+  stub_bin=$(mktemp -d)
+  cat >"$stub_bin/record_argv" <<EOF
+#!/usr/bin/env bash
+printf '%s\n' "\$@" >>"$argv_log"
+EOF
+  chmod +x "$stub_bin/record_argv"
+  (
+    sleep 0.4
+    echo trigger >>"$watch_dir/marker"
+  ) &
+  run env PATH="$stub_bin:$PATH" timeout 8s "$ONCHANGE" -W "$watch_dir" -w "$watch_dir" -t 1 -- "$stub_bin/record_argv" "arg one" "arg two"
+  grep -qx 'arg one' "$argv_log"
+  grep -qx 'arg two' "$argv_log"
+  rm -rf "$watch_dir" "$stub_bin"
+  rm -f "$argv_log"
+}