diff --git a/packages/orchestration/src/service.js b/packages/orchestration/src/service.js
index 7f92233634c..e6d662d0f65 100644
--- a/packages/orchestration/src/service.js
+++ b/packages/orchestration/src/service.js
@@ -58,8 +58,9 @@ export const ChainAccountI = M.interface('ChainAccount', {
   getLocalAddress: M.call().returns(M.string()),
   getRemoteAddress: M.call().returns(M.string()),
   getPort: M.call().returns(M.remotable('Port')),
+  // FIXME including this causes an error in bootstrap tests: 'Vat Creation Error: Error: Error: "[Symbol(passStyle)]" property expected: "[Function <anon>]"'
   // XXX better shape
-  executeTx: M.call(M.arrayOf(M.any)).optional(M.record()).returns(M.promise()),
+  // executeTx: M.call(M.arrayOf(M.any)).optional(M.record()).returns(M.promise()),
   executeEncodedTx: M.call(M.arrayOf(Proto3Shape))
     .optional(M.record())
     .returns(M.promise()),
@@ -130,9 +131,9 @@ const prepareChainAccount = zone =>
         getPort() {
           return this.state.port;
         },
-        executeTx() {
-          throw new Error('not yet implemented');
-        },
+        // executeTx() {
+        //   throw new Error('not yet implemented');
+        // },
         /**
          * Submit a transaction on behalf of the remote accoutn for execution on teh remote chain.
          * @param {AnyJson[]} msgs
diff --git a/packages/orchestration/src/types.d.ts b/packages/orchestration/src/types.d.ts
index bf7bef05be1..cdd4740ff25 100644
--- a/packages/orchestration/src/types.d.ts
+++ b/packages/orchestration/src/types.d.ts
@@ -234,7 +234,7 @@ export interface ChainAccount {
    * @param msgs - records for the transaction
    * @returns acknowledgement string
    */
-  executeTx: (msgs: Proto3JSONMsg[]) => Promise<string>;
+  // executeTx: (msgs: Proto3JSONMsg[]) => Promise<string>;
   /**
    * Submit a transaction on behalf of the remote account for execution on the remote chain.
    * @param msgs - records for the transaction