diff --git a/Tests/SQLiteDataTests/JSONBTests.swift b/Tests/SQLiteDataTests/JSONBTests.swift
new file mode 100644
index 00000000..3c5a90d6
--- /dev/null
+++ b/Tests/SQLiteDataTests/JSONBTests.swift
@@ -0,0 +1,50 @@
+import Foundation
+import SQLiteData
+import Testing
+
+@Suite struct JSONBTests {
+  @available(iOS 26, macOS 26, tvOS 26, watchOS 26, *)
+  @DatabaseFunction(as: ((AttributedString.JSONBRepresentation) -> String).self)
+  private func string(from attributedString: AttributedString) -> String {
+    String(attributedString.characters[...])
+  }
+  
+  @available(iOS 26, macOS 26, tvOS 26, watchOS 26, *)
+  @Test func databaseFunctionWithJSONBArgument() throws {
+    var configuration = Configuration()
+    configuration.prepareDatabase { db in
+      db.add(function: $string)
+    }
+    let database = try DatabaseQueue(configuration: configuration)
+    
+    try database.write { db in
+      try #sql(
+        """
+        CREATE TABLE "items" (
+          "id" INTEGER PRIMARY KEY AUTOINCREMENT,
+          "text" BLOB NOT NULL
+        ) STRICT
+        """
+      )
+      .execute(db)
+    }
+    
+    try database.write { db in
+      try Item.insert {
+        Item.Draft(text: AttributedString("blob"))
+      }.execute(db)
+      
+      _ = try Item.all
+        .select { $string($0.text) }
+        .fetchOne(db)
+    }
+  }
+}
+
+@available(iOS 26, macOS 26, tvOS 26, watchOS 26, *)
+@Table
+private struct Item: Identifiable {
+  let id: Int
+  @Column(as: AttributedString.JSONBRepresentation.self)
+  var text: AttributedString
+}