diff --git a/client/src/client.rs b/client/src/client.rs
index a5fe8acb..dc92d137 100644
--- a/client/src/client.rs
+++ b/client/src/client.rs
@@ -861,10 +861,14 @@ pub trait RpcApi: Sized {
     fn test_mempool_accept<R: RawTx>(
         &self,
         rawtxs: &[R],
+        maxfeerate: Option<Amount>,
     ) -> Result<Vec<json::TestMempoolAcceptResult>> {
         let hexes: Vec<serde_json::Value> =
             rawtxs.to_vec().into_iter().map(|r| r.raw_hex().into()).collect();
-        self.call("testmempoolaccept", &[hexes.into()])
+        match maxfeerate {
+            Some(max) => self.call("testmempoolaccept", &[hexes.into(), max.to_btc().into()]),
+            None => self.call("testmempoolaccept", &[hexes.into()]),
+        }
     }
 
     fn stop(&self) -> Result<String> {
diff --git a/integration_test/src/main.rs b/integration_test/src/main.rs
index 437b8d9c..3c82d59a 100644
--- a/integration_test/src/main.rs
+++ b/integration_test/src/main.rs
@@ -758,12 +758,12 @@ fn test_test_mempool_accept(cl: &Client) {
 
     let tx =
         cl.create_raw_transaction(&[input.clone()], &output, Some(500_000), Some(false)).unwrap();
-    let res = cl.test_mempool_accept(&[&tx]).unwrap();
+    let res = cl.test_mempool_accept(&[&tx], None).unwrap();
     assert!(!res[0].allowed);
     assert!(res[0].reject_reason.is_some());
     let signed =
         cl.sign_raw_transaction_with_wallet(&tx, None, None).unwrap().transaction().unwrap();
-    let res = cl.test_mempool_accept(&[&signed]).unwrap();
+    let res = cl.test_mempool_accept(&[&signed], None).unwrap();
     assert!(res[0].allowed, "not allowed: {:?}", res[0].reject_reason);
 }