diff --git a/tests/bson/bson-utcdatetime-008.phpt b/tests/bson/bson-utcdatetime-008.phpt
deleted file mode 100644
index e8a9bb10..00000000
--- a/tests/bson/bson-utcdatetime-008.phpt
+++ /dev/null
@@ -1,16 +0,0 @@
---TEST--
-MongoDB\BSON\UTCDateTime construction from 64-bit integer as string
---FILE--
-<?php
-
-require_once __DIR__ . '/../utils/basic.inc';
-
-echo throws(fn () => new MongoDB\BSON\UTCDateTime('1416445411987'), MongoDB\Driver\Exception\InvalidArgumentException::class), PHP_EOL;
-
-?>
-===DONE===
-<?php exit(0); ?>
---EXPECT--
-OK: Got MongoDB\Driver\Exception\InvalidArgumentException
-Expected integer or object, string given
-===DONE===
diff --git a/tests/bson/bson-utcdatetime_error-003.phpt b/tests/bson/bson-utcdatetime_error-003.phpt
deleted file mode 100644
index 3b5afdcf..00000000
--- a/tests/bson/bson-utcdatetime_error-003.phpt
+++ /dev/null
@@ -1,38 +0,0 @@
---TEST--
-MongoDB\BSON\UTCDateTime constructor requires strings to parse as 64-bit integers
---FILE--
-<?php
-
-require_once __DIR__ . '/../utils/basic.inc';
-
-echo throws(function() {
-    new MongoDB\BSON\UTCDateTime('1234.5678');
-}, 'MongoDB\Driver\Exception\InvalidArgumentException'), "\n";
-
-// Out-of-range values
-echo throws(function() {
-    new MongoDB\BSON\UTCDateTime('9223372036854775808');
-}, 'MongoDB\Driver\Exception\InvalidArgumentException'), "\n";
-
-echo throws(function() {
-    new MongoDB\BSON\UTCDateTime('-9223372036854775809');
-}, 'MongoDB\Driver\Exception\InvalidArgumentException'), "\n";
-
-echo throws(function() {
-    new MongoDB\BSON\UTCDateTime('18446744073709551615');
-}, 'MongoDB\Driver\Exception\InvalidArgumentException'), "\n";
-
-
-?>
-===DONE===
-<?php exit(0); ?>
---EXPECT--
-OK: Got MongoDB\Driver\Exception\InvalidArgumentException
-Expected integer or object, string given
-OK: Got MongoDB\Driver\Exception\InvalidArgumentException
-Expected integer or object, string given
-OK: Got MongoDB\Driver\Exception\InvalidArgumentException
-Expected integer or object, string given
-OK: Got MongoDB\Driver\Exception\InvalidArgumentException
-Expected integer or object, string given
-===DONE===
diff --git a/tests/bson/bson-utcdatetime_error-004.phpt b/tests/bson/bson-utcdatetime_error-004.phpt
index e4d123a4..9e879805 100644
--- a/tests/bson/bson-utcdatetime_error-004.phpt
+++ b/tests/bson/bson-utcdatetime_error-004.phpt
@@ -8,12 +8,19 @@ require_once __DIR__ . '/../utils/basic.inc';
 /* UTCDateTime::__construct() internally converts floats to integers, so we will
  * not use a float to test for an invalid value. We also don't test an object,
  * since that is used for validating a possible DateTimeInterface argument. */
-$invalidValues = [true, []];
+$invalidValues = [
+    true,
+    [],
+    // Numeric strings are no longer supported as of 2.0
+    '1416445411987',
+    '1234.5678',
+];
 
 foreach ($invalidValues as $invalidValue) {
-    echo throws(function() use ($invalidValue) {
-        new MongoDB\BSON\UTCDateTime($invalidValue);
-    }, 'MongoDB\Driver\Exception\InvalidArgumentException'), "\n";
+    echo throws(
+        fn () => new MongoDB\BSON\UTCDateTime($invalidValue),
+        MongoDB\Driver\Exception\InvalidArgumentException::class,
+    ), PHP_EOL;
 }
 
 ?>
@@ -24,4 +31,8 @@ OK: Got MongoDB\Driver\Exception\InvalidArgumentException
 Expected integer or object, bool given
 OK: Got MongoDB\Driver\Exception\InvalidArgumentException
 Expected integer or object, array given
+OK: Got MongoDB\Driver\Exception\InvalidArgumentException
+Expected integer or object, string given
+OK: Got MongoDB\Driver\Exception\InvalidArgumentException
+Expected integer or object, string given
 ===DONE===