diff --git a/Sources/SQLiteData/CloudKit/Internal/Metadatabase.swift b/Sources/SQLiteData/CloudKit/Internal/Metadatabase.swift
index fb316fd9..5b075097 100644
--- a/Sources/SQLiteData/CloudKit/Internal/Metadatabase.swift
+++ b/Sources/SQLiteData/CloudKit/Internal/Metadatabase.swift
@@ -27,10 +27,18 @@
 
     var metadatabaseConfiguration = Configuration()
     metadatabaseConfiguration.observesSuspensionNotifications = configuration.observesSuspensionNotifications
-    let metadatabase = try DatabasePool(
-      path: url.path(percentEncoded: false),
-      configuration: metadatabaseConfiguration
-    )
+    let metadatabase: any DatabaseWriter =
+      if url.isInMemory {
+        try DatabaseQueue(
+          path: url.absoluteString,
+          configuration: metadatabaseConfiguration
+        )
+      } else {
+        try DatabasePool(
+          path: url.path(percentEncoded: false),
+          configuration: metadatabaseConfiguration
+        )
+      }
     try migrate(metadatabase: metadatabase)
     return metadatabase
   }
diff --git a/Tests/SQLiteDataTests/CloudKitTests/MetadatabaseTests.swift b/Tests/SQLiteDataTests/CloudKitTests/MetadatabaseTests.swift
new file mode 100644
index 00000000..eb00882a
--- /dev/null
+++ b/Tests/SQLiteDataTests/CloudKitTests/MetadatabaseTests.swift
@@ -0,0 +1,26 @@
+#if canImport(CloudKit)
+  import Foundation
+  import GRDB
+  import OSLog
+  @testable import SQLiteData
+  import Testing
+
+  @Suite struct MetadatabaseTests {
+    @available(iOS 17, macOS 14, tvOS 17, watchOS 10, *)
+    @Test func inMemoryMetadatabase() throws {
+      let url = try URL.metadatabase(databasePath: ":memory:", containerIdentifier: nil)
+      #expect(url.isInMemory)
+
+      let metadatabase = try defaultMetadatabase(
+        logger: Logger(subsystem: "test", category: "test"),
+        url: url,
+        configuration: Configuration()
+      )
+      let mainDatabaseFile = try metadatabase.read { db in
+        try String.fetchOne(db, sql: "SELECT file FROM pragma_database_list WHERE name = 'main'")
+      }
+      // Metadatabase is in-memory
+      #expect(mainDatabaseFile == "")
+    }
+  }
+#endif