--- a/runtime/common/config/substrate.rs
+++ b/runtime/common/config/substrate.rs
@@ -161,6 +161,8 @@
 	/// The ubiquitous event type.
 	type RuntimeEvent = RuntimeEvent;
 	// FIXME: Is () the new treasury?
+	// Switch to real treasury once we start having dust removals
+	// Related issue: https://github.com/paritytech/polkadot/issues/7323
 	type DustRemoval = ();
 	type ExistentialDeposit = ExistentialDeposit;
 	type AccountStore = System;
--- a/tests/src/util/playgrounds/unique.ts
+++ b/tests/src/util/playgrounds/unique.ts
@@ -682,7 +682,6 @@
     options: Partial<SignerOptions> | null = null,/*, failureMessage='expected success'*/
   ): Promise<ITransactionResult> {
     if(this.api === null) throw Error('API not initialized');
-    if(!extrinsic.startsWith('api.tx.')) throw Error(`${extrinsic} is not transaction`);
 
     const startTime = (new Date()).getTime();
     let result: ITransactionResult;
@@ -734,6 +733,7 @@
   }
 
   async callRpc
+  // TODO: make it strongly typed, or use api.query/api.rpc directly
   // <
   // K extends 'rpc' | 'query',
   // E extends string,