diff --git a/packages/caliper-core/lib/worker/tx-observers/logging-tx-observer.js b/packages/caliper-core/lib/worker/tx-observers/logging-tx-observer.js
index 687d71eca..043229d2e 100644
--- a/packages/caliper-core/lib/worker/tx-observers/logging-tx-observer.js
+++ b/packages/caliper-core/lib/worker/tx-observers/logging-tx-observer.js
@@ -46,21 +46,12 @@ class LoggingTxObserver extends TxObserverInterface{
      * @param {TxStatus | TxStatus[]} results The result information of the finished TXs. Can be a collection of results for a batch of TXs.
      */
     txFinished(results) {
-        // TODO: appending metadata should be done by the dispatch
         if (Array.isArray(results)) {
             for (let result of results) {
-                // add extra metadata
-                result.workerIndex = this.workerIndex;
-                result.roundIndex = this.roundIndex;
-
                 // TODO: use fast-json-stringify
                 this.logFunction(JSON.stringify(result));
             }
         } else {
-            // add extra metadata
-            results.workerIndex = this.workerIndex;
-            results.roundIndex = this.roundIndex;
-
             // TODO: use fast-json-stringify
             this.logFunction(JSON.stringify(results));
         }
diff --git a/packages/caliper-core/lib/worker/tx-observers/tx-observer-dispatch.js b/packages/caliper-core/lib/worker/tx-observers/tx-observer-dispatch.js
index f424e15f5..80d7997b8 100644
--- a/packages/caliper-core/lib/worker/tx-observers/tx-observer-dispatch.js
+++ b/packages/caliper-core/lib/worker/tx-observers/tx-observer-dispatch.js
@@ -102,33 +102,24 @@ class TxObserverDispatch extends TxObserverInterface {
             return;
         }
 
+        const metadata = {
+            workerIndex: this.workerIndex,
+            roundIndex: this.currentRound,
+        };
+        const resultWithMetadata = Array.isArray(results)
+            ? results.map(result => ({
+                ...result,
+                ...metadata,
+            }))
+            : {
+                ...results,
+                ...metadata
+            };
+
         for (let observer of this.txObservers) {
-            observer.txFinished(results);
+            observer.txFinished(resultWithMetadata);
         }
     }
 }
 
 module.exports = TxObserverDispatch;
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diff --git a/packages/caliper-core/test/worker/tx-observers/logging-tx-observer.js b/packages/caliper-core/test/worker/tx-observers/logging-tx-observer.js
new file mode 100644
index 000000000..3c7db2589
--- /dev/null
+++ b/packages/caliper-core/test/worker/tx-observers/logging-tx-observer.js
@@ -0,0 +1,106 @@
+/*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+const chai = require('chai');
+const sinon = require('sinon');
+const expect = chai.expect;
+const mockery = require('mockery');
+
+chai.use(require('sinon-chai'));
+
+describe('When monitoring transaction activity', () => {
+    let createLoggingTxObserver, CaliperUtils, observer, logStub;
+
+    before(() => {
+        mockery.enable({
+            warnOnReplace: false,
+            warnOnUnregistered: false
+        });
+
+        CaliperUtils = {
+            getLogger: sinon.stub().returns({
+                info: sinon.stub(),
+                error: sinon.stub(),
+                warn: sinon.stub()
+            })
+        };
+
+        mockery.registerMock('../../common/utils/caliper-utils', CaliperUtils);
+        createLoggingTxObserver = require('../../../lib/worker/tx-observers/logging-tx-observer').createTxObserver;
+    });
+
+    beforeEach(() => {
+        logStub = CaliperUtils.getLogger().info;
+        observer = createLoggingTxObserver({ messageLevel: 'info' }, null, 0);
+    });
+
+    afterEach(() => {
+        sinon.restore();
+        logStub.resetHistory();
+    });
+
+    after(() => {
+        mockery.deregisterAll();
+        mockery.disable();
+    });
+
+    describe('On initialization', () => {
+        it('should set up the logger with default settings if no options are provided', () => {
+            observer = createLoggingTxObserver({}, null, 0);
+            expect(logStub).to.exist;
+        });
+
+        it('should use a specific log level if provided in options', () => {
+            observer = createLoggingTxObserver({ messageLevel: 'warn' }, null, 0);
+            const warnLogger = CaliperUtils.getLogger().warn;
+            expect(warnLogger).to.exist;
+        });
+    });
+
+    describe('When processing submitted transactions', () => {
+        it('should ignore submissions and not log any data', () => {
+            observer.txSubmitted(5);
+            expect(logStub).to.not.have.been.called;
+        });
+    });
+
+    describe('When processing finished transactions', () => {
+        it('should log multiple transaction results', () => {
+            const results = [{ status: 'success' }, { status: 'failed' }];
+            observer.txFinished(results);
+            expect(logStub).to.have.been.calledTwice;
+            expect(logStub.firstCall).to.have.been.calledWithMatch(JSON.stringify({
+                status: 'success',
+            }));
+            expect(logStub.secondCall).to.have.been.calledWithMatch(JSON.stringify({
+                status: 'failed',
+            }));
+        });
+
+        it('should handle empty results without logging', () => {
+            observer.txFinished([]);
+            expect(logStub).to.not.have.been.called;
+        });
+
+        it('should not modify the original result object properties', () => {
+            const result = { status: 'success' };
+            observer.txFinished(result);
+
+            expect(result).to.not.have.property('workerIndex');
+            expect(result).to.not.have.property('roundIndex');
+        });
+    });
+});