diff --git a/test/dummy/config/initializers/sqlite3.rb b/test/dummy/config/initializers/sqlite3.rb
index 80d0fec0..bb3ee5db 100644
--- a/test/dummy/config/initializers/sqlite3.rb
+++ b/test/dummy/config/initializers/sqlite3.rb
@@ -27,4 +27,8 @@ def configure_connection
     ActiveRecord::ConnectionAdapters::SQLite3Adapter.prepend SqliteImmediateTransactions
     ActiveRecord::ConnectionAdapters::SQLite3Adapter.prepend SQLite3Configuration
   end
+
+  # Suppress fork safety warnings in the dummy app (used by test suite)
+  # Warnings are safe: https://github.com/rails/solid_queue/issues/506
+  SQLite3::ForkSafety.suppress_warnings! if defined?(SQLite3::ForkSafety)
 end