diff --git a/tests/Integration/tec-probe.php b/tests/Integration/tec-probe.php
new file mode 100644
index 0000000..63111e7
--- /dev/null
+++ b/tests/Integration/tec-probe.php
@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * Checks whether a The Events Calendar event created only through generic
+ * WordPress APIs (wp_insert_post + post meta) is found by TEC's own queries.
+ *
+ * Usage: wp eval-file tests/Integration/tec-probe.php
+ *
+ * No strict_types: PHP forbids declare(strict_types) inside eval(), which wp eval-file uses.
+ */
+
+if (! class_exists('Tribe__Events__Main')) {
+    fwrite(STDERR, "The Events Calendar is not active\n");
+    exit(1);
+}
+
+$start = gmdate('Y-m-d', strtotime('+30 days')) . ' 18:00:00';
+$end = gmdate('Y-m-d', strtotime('+30 days')) . ' 20:00:00';
+
+$id = wp_insert_post([
+    'post_type' => 'tribe_events',
+    'post_status' => 'publish',
+    'post_title' => 'LIT Probe Event (wegwerfen)',
+]);
+update_post_meta($id, '_EventStartDate', $start);
+update_post_meta($id, '_EventEndDate', $end);
+
+$derived = [];
+foreach (['_EventStartDateUTC', '_EventEndDateUTC', '_EventDuration', '_EventTimezone'] as $key) {
+    $derived[$key] = get_post_meta($id, $key, true);
+}
+
+$found = tribe_get_events([
+    'start_date' => gmdate('Y-m-d', strtotime('+29 days')),
+    'end_date' => gmdate('Y-m-d', strtotime('+31 days')),
+    'fields' => 'ids',
+]);
+
+echo wp_json_encode([
+    'event_id' => $id,
+    'found_by_tribe_get_events' => in_array($id, (array) $found, true),
+    'derived_meta' => $derived,
+], JSON_PRETTY_PRINT) . "\n";
+
+wp_delete_post($id, true);