diff --git a/tests/UnifiedSpecTests/Operation.php b/tests/UnifiedSpecTests/Operation.php
index 8cb4509dd..b225fc2f1 100644
--- a/tests/UnifiedSpecTests/Operation.php
+++ b/tests/UnifiedSpecTests/Operation.php
@@ -750,6 +750,9 @@ private function executeForSession(Session $session)
             case 'endSession':
                 return $session->endSession();
 
+            case 'getSnapshotTime':
+                throw new \RuntimeException('TODO: Implement getSnapshotTime');
+
             case 'startTransaction':
                 return $session->startTransaction($args);
 
diff --git a/tests/UnifiedSpecTests/Util.php b/tests/UnifiedSpecTests/Util.php
index e134cb109..eee752cf5 100644
--- a/tests/UnifiedSpecTests/Util.php
+++ b/tests/UnifiedSpecTests/Util.php
@@ -128,6 +128,7 @@ final class Util
             'abortTransaction' => [],
             'commitTransaction' => [],
             'endSession' => [],
+            'getSnapshotTime' => [],
             'startTransaction' => ['maxCommitTimeMS', 'readConcern', 'readPreference', 'writeConcern'],
             'withTransaction' => ['callback', 'maxCommitTimeMS', 'readConcern', 'readPreference', 'writeConcern'],
         ],
diff --git a/tests/specifications b/tests/specifications
index d41d48b90..08ba029dc 160000
--- a/tests/specifications
+++ b/tests/specifications
@@ -1 +1 @@
-Subproject commit d41d48b90ef22aedae934dd22f3a21c65b5a13bc
+Subproject commit 08ba029dc8a659d8d3874369e10cb12cf3584b2f