diff --git a/src/PendingBiometric.php b/src/PendingBiometric.php
index 65537fbb..ef8cc33f 100644
--- a/src/PendingBiometric.php
+++ b/src/PendingBiometric.php
@@ -101,7 +101,14 @@ public function prompt(): bool
             if ($result) {
                 $decoded = json_decode($result, true);
 
-                return isset($decoded['status']) && $decoded['status'] === 'success';
+                // The bridge returns a function's data as-is on success
+                // (mobile-biometrics answers {"launched": true} on Android and
+                // {} on iOS) and only adds a status key for errors:
+                // {"status": "error", "code": ..., "message": ...}.
+                // The outcome itself arrives later as the Completed event.
+                $isError = isset($decoded['status']) && $decoded['status'] === 'error';
+
+                return ! $isError;
             }
         }
 
diff --git a/tests/Unit/Biometrics/PendingBiometricTest.php b/tests/Unit/Biometrics/PendingBiometricTest.php
new file mode 100644
index 00000000..a6b3555b
--- /dev/null
+++ b/tests/Unit/Biometrics/PendingBiometricTest.php
@@ -0,0 +1,60 @@
+<?php
+
+use Native\Mobile\Events\Biometric\Completed;
+use Native\Mobile\PendingBiometric;
+use Native\Mobile\Testing\FakeBridge;
+
+/**
+ * prompt() reports whether the native prompt started. The bridge returns a
+ * function's data unwrapped on success and {"status": "error", ...} on
+ * failure, so only an error (or no answer at all) means it did not start.
+ */
+beforeEach(fn () => FakeBridge::enable());
+afterEach(fn () => FakeBridge::disable());
+
+it('sends the id and event class to Biometric.Prompt', function () {
+    (new PendingBiometric)->id('unlock-1')->prompt();
+
+    FakeBridge::current()->assertCalled('Biometric.Prompt', fn ($params) => $params === [
+        'id' => 'unlock-1',
+        'event' => Completed::class,
+    ]);
+});
+
+it('reports a started prompt for the payloads mobile-biometrics returns', function (string $response) {
+    FakeBridge::current()->respondTo('Biometric.Prompt', $response);
+
+    expect((new PendingBiometric)->prompt())->toBeTrue();
+})->with([
+    'android' => '{"launched":true}',
+    'ios' => '{}',
+    'empty array' => '[]',
+]);
+
+it('reports a bridge error as not started', function () {
+    FakeBridge::current()->respondTo('Biometric.Prompt', [
+        'status' => 'error',
+        'code' => 'UNKNOWN_ERROR',
+        'message' => 'Unexpected error',
+        'data' => [],
+    ]);
+
+    expect((new PendingBiometric)->prompt())->toBeFalse();
+});
+
+it('reports a missing bridge function as not started', function () {
+    FakeBridge::current()->respondTo('Biometric.Prompt', null);
+
+    expect((new PendingBiometric)->prompt())->toBeFalse();
+});
+
+it('only prompts once', function () {
+    FakeBridge::current()->respondTo('Biometric.Prompt', '{}');
+
+    $pending = new PendingBiometric;
+
+    expect($pending->prompt())->toBeTrue()
+        ->and($pending->prompt())->toBeFalse();
+
+    FakeBridge::current()->assertCalledTimes('Biometric.Prompt', 1);
+});