diff --git a/tests/FunctionAnyTestRejectedShouldReportUnhandled.phpt b/tests/FunctionAnyTestRejectedShouldReportUnhandled.phpt
index 935518a..a33e380 100644
--- a/tests/FunctionAnyTestRejectedShouldReportUnhandled.phpt
+++ b/tests/FunctionAnyTestRejectedShouldReportUnhandled.phpt
@@ -20,7 +20,7 @@ any([
 --EXPECTF--
 Unhandled promise rejection with React\Promise\Exception\CompositeException: All promises rejected. in %s:%d
 Stack trace:
-#0 %s/src/Promise.php(%d): React\Promise\{closure}(%S)
+#0 %s/src/Promise.php(%d): %S{closure%S}(%S)
 #1 %s/src/Promise.php(%d): React\Promise\Promise->call(%S)
 #2 %s/src/functions.php(%d): React\Promise\Promise->__construct(%S)
 #3 %s(%d): React\Promise\any(%S)
diff --git a/tests/FunctionRejectTestFinallyThatThrowsNewExceptionShouldReportUnhandledForNewExceptionOnly.phpt b/tests/FunctionRejectTestFinallyThatThrowsNewExceptionShouldReportUnhandledForNewExceptionOnly.phpt
index 6e6eaa9..5b228fb 100644
--- a/tests/FunctionRejectTestFinallyThatThrowsNewExceptionShouldReportUnhandledForNewExceptionOnly.phpt
+++ b/tests/FunctionRejectTestFinallyThatThrowsNewExceptionShouldReportUnhandledForNewExceptionOnly.phpt
@@ -18,8 +18,8 @@ reject(new RuntimeException('foo'))->finally(function (): void {
 --EXPECTF--
 Unhandled promise rejection with RuntimeException: Finally! in %s:%d
 Stack trace:
-#0 %s/src/Internal/RejectedPromise.php(%d): {closure}(%S)
-#1 %s/src/Internal/RejectedPromise.php(%d): React\Promise\Internal\RejectedPromise->React\Promise\Internal\{closure}(%S)
+#0 %s/src/Internal/RejectedPromise.php(%d): {closure%S}(%S)
+#1 %s/src/Internal/RejectedPromise.php(%d): React\Promise\Internal\RejectedPromise->%S{closure%S}(%S)
 #2 %s/src/Internal/RejectedPromise.php(%d): React\Promise\Internal\RejectedPromise->then(%S)
 #3 %s(%d): React\Promise\Internal\RejectedPromise->finally(%S)
 #4 %A{main}
diff --git a/tests/FunctionRejectTestThenMatchingThatThrowsNewExceptionShouldReportUnhandledRejectionForNewExceptionOnly.phpt b/tests/FunctionRejectTestThenMatchingThatThrowsNewExceptionShouldReportUnhandledRejectionForNewExceptionOnly.phpt
index b6b7f2f..68bcec7 100644
--- a/tests/FunctionRejectTestThenMatchingThatThrowsNewExceptionShouldReportUnhandledRejectionForNewExceptionOnly.phpt
+++ b/tests/FunctionRejectTestThenMatchingThatThrowsNewExceptionShouldReportUnhandledRejectionForNewExceptionOnly.phpt
@@ -18,6 +18,6 @@ reject(new RuntimeException('foo'))->then(null, function () {
 --EXPECTF--
 Unhandled promise rejection with RuntimeException: bar in %s:%d
 Stack trace:
-#0 %s/src/Internal/RejectedPromise.php(%d): {closure}(%S)
+#0 %s/src/Internal/RejectedPromise.php(%d): {closure%S}(%S)
 #1 %s(%d): React\Promise\Internal\RejectedPromise->then(%S)
 #2 %A{main}
diff --git a/tests/FunctionRejectTestThenMismatchThrowsTypeErrorAndShouldReportUnhandledForTypeErrorOnlyOnPhp8.phpt b/tests/FunctionRejectTestThenMismatchThrowsTypeErrorAndShouldReportUnhandledForTypeErrorOnlyOnPhp8.phpt
index bd75cda..aa56786 100644
--- a/tests/FunctionRejectTestThenMismatchThrowsTypeErrorAndShouldReportUnhandledForTypeErrorOnlyOnPhp8.phpt
+++ b/tests/FunctionRejectTestThenMismatchThrowsTypeErrorAndShouldReportUnhandledForTypeErrorOnlyOnPhp8.phpt
@@ -18,8 +18,8 @@ reject(new RuntimeException('foo'))->then(null, function (UnexpectedValueExcepti
 
 ?>
 --EXPECTF--
-Unhandled promise rejection with TypeError: {closure}(): Argument #1 ($unexpected) must be of type UnexpectedValueException, RuntimeException given, called in %s/src/Internal/RejectedPromise.php on line %d in %s:%d
+Unhandled promise rejection with TypeError: {closure%S}(): Argument #1 ($unexpected) must be of type UnexpectedValueException, RuntimeException given, called in %s/src/Internal/RejectedPromise.php on line %d in %s:%d
 Stack trace:
-#0 %s/src/Internal/RejectedPromise.php(%d): {closure}(%S)
+#0 %s/src/Internal/RejectedPromise.php(%d): {closure%S}(%S)
 #1 %s(%d): React\Promise\Internal\RejectedPromise->then(%S)
 #2 %A{main}
diff --git a/tests/FunctionSetRejectionHandlerThatTriggersErrorHandlerThatThrowsShouldTerminateProgramForUnhandled.phpt b/tests/FunctionSetRejectionHandlerThatTriggersErrorHandlerThatThrowsShouldTerminateProgramForUnhandled.phpt
index b691039..5ed9687 100644
--- a/tests/FunctionSetRejectionHandlerThatTriggersErrorHandlerThatThrowsShouldTerminateProgramForUnhandled.phpt
+++ b/tests/FunctionSetRejectionHandlerThatTriggersErrorHandlerThatThrowsShouldTerminateProgramForUnhandled.phpt
@@ -27,9 +27,9 @@ echo 'NEVER';
 --EXPECTF--
 Fatal error: Uncaught OverflowException from unhandled promise rejection handler: This function should never throw in %s:%d
 Stack trace:
-#0 [internal function]: {closure}(%S)
+#0 [internal function]: {closure%S}(%S)
 #1 %s(%d): trigger_error(%S)
-#2 %s/src/Internal/RejectedPromise.php(%d): {closure}(%S)
+#2 %s/src/Internal/RejectedPromise.php(%d): {closure%S}(%S)
 #3 %s/src/functions.php(%d): React\Promise\Internal\RejectedPromise->__destruct()
 #4 %s(%d): React\Promise\reject(%S)
 #5 %A{main}