diff --git a/Zend/tests/gh10346.phpt b/Zend/tests/gh10346.phpt
new file mode 100644
index 00000000000..74fce28e230
--- /dev/null
+++ b/Zend/tests/gh10346.phpt
@@ -0,0 +1,29 @@
+--TEST--
+GH-10346 (Observer: enum tryFrom() run_time_cache properly assigned)
+--CREDITS--
+Florian Sowade
+--EXTENSIONS--
+zend_test
+--INI--
+zend_test.observer.enabled=1
+zend_test.observer.observe_all=1
+--FILE--
+<?php
+enum Card : string
+{
+    case HEART = 'H';
+}
+
+var_dump(Card::tryFrom('H'));
+?>
+--EXPECTF--
+<!-- init '%s' -->
+<file '%s'>
+  <!-- init Card::tryFrom() -->
+  <Card::tryFrom>
+  </Card::tryFrom>
+  <!-- init var_dump() -->
+  <var_dump>
+enum(Card::HEART)
+  </var_dump>
+</file '%s'>