diff --git a/tests/test_issue_5056_events_abort_exit.sh b/tests/test_issue_5056_events_abort_exit.sh
new file mode 100755
index 000000000..3167bd1ed
--- /dev/null
+++ b/tests/test_issue_5056_events_abort_exit.sh
@@ -0,0 +1,105 @@
+#!/bin/bash
+# Regression for #5056: passing an AbortSignal to events.once / events.on must
+# not leave a leaked keepalive (pending promise / abort listener) parking the
+# event loop. The programs finish their work, print the right output, and Node
+# exits 0 — Perry must do the same instead of hanging in the event-loop park.
+#
+# The node-suite parity harness compares stdout but a hang only shows up as a
+# timeout/exit-code mismatch, and the differential runner is not part of the
+# per-PR gate, so this stand-alone guard pins the exit behaviour directly (same
+# shape as tests/test_issue_3730_timers_promises_unref_await.sh).
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+PERRY="${PERRY:-$REPO_ROOT/target/release/perry}"
+
+if [[ ! -x "$PERRY" ]]; then
+    PERRY="$REPO_ROOT/target/debug/perry"
+fi
+if [[ ! -x "$PERRY" ]]; then
+    echo "SKIP: perry binary not found (build with cargo build --release -p perry)"
+    exit 0
+fi
+
+run_with_timeout() {
+    local secs="$1"
+    shift
+    if command -v timeout >/dev/null 2>&1; then
+        timeout "$secs" "$@"
+        return $?
+    fi
+    if command -v gtimeout >/dev/null 2>&1; then
+        gtimeout "$secs" "$@"
+        return $?
+    fi
+    "$@" &
+    local pid=$!
+    ( sleep "$secs" && kill -TERM "$pid" 2>/dev/null && sleep 1 && kill -KILL "$pid" 2>/dev/null ) &
+    local watcher=$!
+    if wait "$pid" 2>/dev/null; then
+        kill -TERM "$watcher" 2>/dev/null || true
+        wait "$watcher" 2>/dev/null || true
+        return 0
+    fi
+    local rc=$?
+    kill -TERM "$watcher" 2>/dev/null || true
+    wait "$watcher" 2>/dev/null || true
+    [[ "$rc" == "143" ]] && return 124
+    return "$rc"
+}
+
+TMPDIR="$(mktemp -d)"
+trap 'rm -rf "$TMPDIR"' EXIT
+
+# fixture-name | source path | expected stdout
+check_case() {
+    local name="$1"
+    local src="$2"
+    local expected="$3"
+    local bin="$TMPDIR/$name"
+
+    env PERRY_ALLOW_UNIMPLEMENTED=1 PERRY_NO_AUTO_OPTIMIZE=1 \
+        "$PERRY" compile --no-cache "$src" -o "$bin" \
+        >"$TMPDIR/compile_$name.log" 2>&1 || {
+            echo "FAIL: compile failed for $name"
+            sed 's/^/    /' "$TMPDIR/compile_$name.log" | tail -80
+            exit 1
+        }
+
+    set +e
+    run_with_timeout 8 "$bin" >"$TMPDIR/run_$name.log" 2>&1
+    local rc=$?
+    set -e
+
+    if [[ "$rc" -eq 124 ]]; then
+        echo "FAIL: $name hung at exit (event loop parked on a leaked keepalive)"
+        sed 's/^/    /' "$TMPDIR/run_$name.log" | tail -80
+        exit 1
+    fi
+    if [[ "$rc" -ne 0 ]]; then
+        echo "FAIL: $name exited with $rc (expected 0)"
+        sed 's/^/    /' "$TMPDIR/run_$name.log" | tail -80
+        exit 1
+    fi
+    if [[ "$(cat "$TMPDIR/run_$name.log")" != "$expected" ]]; then
+        echo "FAIL: $name output mismatch"
+        echo "  expected:"; printf '%s\n' "$expected" | sed 's/^/    /'
+        echo "  got:"; sed 's/^/    /' "$TMPDIR/run_$name.log"
+        exit 1
+    fi
+    echo "  ok: $name"
+}
+
+check_case "once-abort" \
+    "$REPO_ROOT/test-parity/node-suite/events/once/abort-cleans-pending-error.ts" \
+    "abort: AbortError:ABORT_ERR
+late error: late"
+
+check_case "on-abort" \
+    "$REPO_ROOT/test-parity/node-suite/events/on/async-iterator-abort.ts" \
+    "abort: AbortError ABORT_ERR
+seen: a,b"
+
+echo "PASS"