diff --git a/aos/configuration.h b/aos/configuration.h
index c6d25df..c22a1cf 100644
--- a/aos/configuration.h
+++ b/aos/configuration.h
@@ -40,6 +40,12 @@
 FlatbufferDetachedBuffer<Configuration> MergeWithConfig(
     const Configuration *config, const Flatbuffer<Configuration> &addition);
 
+// Adds the list of schemas to the provide config json.  This should mostly be
+// used for testing and in conjunction with MergeWithConfig.
+FlatbufferDetachedBuffer<aos::Configuration> AddSchema(
+    std::string_view json,
+    const std::vector<FlatbufferVector<reflection::Schema>> &schemas);
+
 // Returns the resolved Channel for a name, type, and application name. Returns
 // nullptr if none is found.
 //