1 files changed, 18 insertions, 0 deletions

diff --git a/docs/TESTING.md b/docs/TESTING.md
index ec5c681..3c7fa61 100644
--- a/docs/TESTING.md
+++ b/docs/TESTING.md
@@ -14,6 +14,7 @@ shared global database. Each test owns its state.
 | `tests/client_core.rs` | Client command/game flows via a headless screen applying logical effects. |
 | `tests/client_ui.rs` | Help, history, completion, bet parsing, display width, cursor math. |
 | `tests/blackjack.rs` | Card totals, naturals, hit/stand/double, dealer bust, S17, state parsing. |
+| `tests/crash.rs` | Multiplier curve, payout floor, crash-point distribution, house edge, cap. |
 | `tests/protocol.rs` | Newline buffering and timeout/error classification. |
 | `tests/roulette.rs` | European wheel, split-bet payouts, zero handling, result parser. |
 | `tests/server_core.rs` | Handler, bcrypt migration, SQL injection, transaction rollback, `plays` audit, sessions. |
@@ -93,6 +94,23 @@ Use an 80-column terminal because several output lines are width-sensitive.
    double), winnings, and the final cards/result in `details`. A forfeit has
    `result = forfeit`, `winnings = 0`.
 
+## Manual crash checklist
+
+1. `play crash` shows the ready board with a 1.00x multiplier; Space starts and
+   reserves the bet.
+2. The multiplier rises smoothly with no network traffic. Cash out with C and
+   confirm the board shows the cashout multiplier, the payout and the new
+   balance.
+3. On another round, press nothing. The board must switch to `CRASHED at Xx`
+   by itself when the crash point is reached, and the bet must be lost.
+4. Press C just as a round crashes. Either it pays or the crashed result wins;
+   a late cashout must never show an error over a finished round.
+5. Q during a live round forfeits the bet; Q when idle just leaves.
+6. Check the audit rows: one per round, `game_type = crash`, the reserved bet,
+   the payout, and `crash_point`/`multiplier`/`result` in `details`.
+7. Confirm the crash point is absent from the `CRASH_START` line (it must only
+   appear once the round is over).
+
 ## Manual server checks
 
 - Register, log out, log in again (bcrypt path).