diff --git a/packages/operators/CHANGELOG.md b/packages/operators/CHANGELOG.md
index db4a411..8811fb4 100644
--- a/packages/operators/CHANGELOG.md
+++ b/packages/operators/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Project Changelog
 
+# [@rxjs-collection/operators-v1.0.13-beta.1](https://github.com/basics/rxjs-collection/compare/@rxjs-collection/operators-v1.0.12...@rxjs-collection/operators-v1.0.13-beta.1) (2024-11-27)
+
+
+### Bug Fixes
+
+* **operators:** added error test case ([8495596](https://github.com/basics/rxjs-collection/commit/84955962d3f6bc50a6fe7e47bafaf0bcc686c231))
+* **operators:** cleanup ([236fb2e](https://github.com/basics/rxjs-collection/commit/236fb2e6119c4e6911cf4ec7deed9afffe6cbb04))
+* **operators:** log test ([14bcad4](https://github.com/basics/rxjs-collection/commit/14bcad4549391af15ec8486ecd4c6303d2ac372c))
+* **operators:** more readable test data ([5edeb7c](https://github.com/basics/rxjs-collection/commit/5edeb7c73d542401c92f9f30f16ac3ebe3de7088))
+* **operators:** refactored log ([345487e](https://github.com/basics/rxjs-collection/commit/345487e7f8aa0072c728d726a7a8517fae154330))
+* **operators:** strip datetimeisostring from log output ([d26ab18](https://github.com/basics/rxjs-collection/commit/d26ab186cfbc91c3e1afc7237198475192049822))
+
 # [@rxjs-collection/operators-v1.0.12](https://github.com/basics/rxjs-collection/compare/@rxjs-collection/operators-v1.0.11...@rxjs-collection/operators-v1.0.12) (2024-11-26)
 
 
diff --git a/packages/operators/package.json b/packages/operators/package.json
index d95372b..2b9137d 100644
--- a/packages/operators/package.json
+++ b/packages/operators/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@rxjs-collection/operators",
-  "version": "1.0.12",
+  "version": "1.0.13-beta.1",
   "description": "rxjs operators",
   "license": "MIT",
   "contributors": [
diff --git a/packages/operators/src/cache.test.js b/packages/operators/src/cache.test.js
index 6496b70..b20f9f9 100644
--- a/packages/operators/src/cache.test.js
+++ b/packages/operators/src/cache.test.js
@@ -1,6 +1,7 @@
+import { mockResponse } from '#mocks/response.js';
 import { map } from 'rxjs';
 import { TestScheduler } from 'rxjs/testing';
-import { beforeEach, describe, expect, test } from 'vitest';
+import { afterAll, beforeAll, beforeEach, describe, expect, test, vi } from 'vitest';
 
 import { cache } from './cache';
 import { log } from './log';
@@ -8,14 +9,22 @@ import { log } from './log';
 describe('cache', () => {
   let testScheduler;
 
+  beforeAll(async () => {
+    global.Response = mockResponse();
+  });
+
   beforeEach(() => {
     testScheduler = new TestScheduler((actual, expected) => expect(actual).deep.equal(expected));
   });
 
+  afterAll(() => {
+    vi.restoreAllMocks();
+  });
+
   test('default', () => {
     const expectedVal = {
-      a: new Response('initial', { status: 200 }),
-      b: new Response('updated', { status: 200 })
+      a: new Response('initial'),
+      b: new Response('updated')
     };
 
     const triggerVal = [expectedVal.a, expectedVal.b];
@@ -24,8 +33,8 @@ describe('cache', () => {
       const stream = cold('a', { a: () => triggerVal.shift() }).pipe(
         map(fn => fn()),
         log('operators:cache:default:input'),
-        cache({ ttl: 2 })
-        // log('operators:cache:default:output')
+        cache({ ttl: 2 }),
+        log('operators:cache:default:output')
       );
 
       const unsubA = '-^!';
diff --git a/packages/operators/src/log.js b/packages/operators/src/log.js
index efa2dc2..7bef0cd 100644
--- a/packages/operators/src/log.js
+++ b/packages/operators/src/log.js
@@ -1,32 +1,36 @@
 import { bgGreen } from 'ansi-colors';
 import debug from 'debug';
-import { connectable, finalize, Subject, tap } from 'rxjs';
+import { connectable, finalize, Observable, Subject } from 'rxjs';
 
-import { pipeWhen } from './when';
-
-export const enableLog = tag => {
-  debug.enable(tag);
-};
+export const enableLog = tag => debug.enable(tag);
 
 export const log = tag => {
   const logger = debug(tag);
   logger.log = global.console.log.bind(console);
   const error = debug(`${tag}:error`);
 
-  return source =>
-    source.pipe(
-      pipeWhen(
-        () => debug.enabled(tag),
-        tap({
-          subscribe: () => logger('subscribed'),
-          unsubscribe: () => logger('unsubscribed'),
-          finalize: () => logger('finalize'),
-          next: val => logger(val),
-          error: err => error(err),
-          complete: () => logger(bgGreen.bold('complete!'))
-        })
-      )
-    );
+  if (debug.enabled(tag)) {
+    return source => {
+      return new Observable(observer => {
+        return source.subscribe({
+          next: val => {
+            logger(val);
+            observer.next(val);
+          },
+          error: err => {
+            error(err);
+            observer.error(err);
+          },
+          complete: () => {
+            logger(bgGreen.bold('complete!'));
+            observer.complete();
+          }
+        });
+      });
+    };
+  }
+
+  return source => source;
 };
 
 export const logResult = (tag, observable) => {
@@ -40,33 +44,3 @@ export const logResult = (tag, observable) => {
     ).connect();
   });
 };
-
-// export const log = tag => {
-//   var logger = debug(tag);
-//   logger.log = global.console.log.bind(console);
-//   var error = debug(`${tag}:error`);
-
-//   if (debug.enabled(tag)) {
-//     return source =>
-//       new Observable(observer => {
-//         source.subscribe({
-//           subscribe: () => logger('subscribed'),
-//           unsubscribe: () => logger('unsubscribed'),
-//           finalize: () => logger('finalize'),
-//           next: val => {
-//             logger(val);
-//             observer.next(val);
-//           },
-//           error: err => {
-//             error(err);
-//             observer.error(err);
-//           },
-//           complete: () => {
-//             logger(bgGreen.bold('complete!'));
-//             observer.complete();
-//           }
-//         });
-//       });
-//   }
-//   return source => source;
-// };
diff --git a/packages/operators/src/log.test.js b/packages/operators/src/log.test.js
index 4a2866f..4b4aeb1 100644
--- a/packages/operators/src/log.test.js
+++ b/packages/operators/src/log.test.js
@@ -1,11 +1,93 @@
-import { describe, test } from 'vitest';
+import { from, map } from 'rxjs';
+import { TestScheduler } from 'rxjs/testing';
+import { afterAll, beforeEach, describe, expect, test, vi } from 'vitest';
+
+import { enableLog, log, logResult } from './log';
 
 describe('log', () => {
+  let testScheduler;
+
+  beforeEach(() => {
+    testScheduler = new TestScheduler((actual, expected) => expect(actual).deep.equal(expected));
+  });
+
+  afterAll(() => {
+    vi.restoreAllMocks();
+  });
+
   test('default', () => {
-    //TODO: add test
+    const expectedVal = {
+      a: 'content a',
+      b: 'content b',
+      c: 'content c'
+    };
+
+    const triggerVal = {
+      a: () => expectedVal.a,
+      b: () => expectedVal.b,
+      c: () => expectedVal.c,
+      d: () => {
+        throw new Error('custom error');
+      }
+    };
+
+    const expected = [
+      '  operators:log:default content a',
+      '  operators:log:default content b',
+      '  operators:log:default content c'
+    ];
+
+    const actual = [];
+    vi.spyOn(console, 'log').mockImplementation(v => {
+      actual.push(replaceDateTimeISOString(stripAnsiCodes(v)));
+      return v;
+    });
+
+    enableLog('operators:log:default');
+    testScheduler.run(({ cold, expectObservable, flush }) => {
+      const stream = cold('a-b-c-d|', triggerVal).pipe(
+        map(v => v()),
+        log('operators:log:default')
+      );
+      expectObservable(stream).toBe('a-b-c-#', expectedVal, new Error('custom error'));
+      flush();
+      expect(actual).deep.equal(expected);
+    });
   });
 
-  test('logResult', () => {
-    //TODO: add test
+  test('logResult', async () => {
+    const actual = [];
+    vi.spyOn(console, 'log').mockImplementation(v => {
+      actual.push(replaceDateTimeISOString(stripAnsiCodes(v)));
+      return v;
+    });
+
+    const expectedVal = [
+      '  operators:log:result content a',
+      '  operators:log:result content b',
+      '  operators:log:result content c',
+      '  operators:log:result complete!'
+    ];
+
+    const triggerVal = ['content a', 'content b', 'content c'];
+
+    enableLog('operators:log:result');
+    await logResult('operators:log:result', from(triggerVal));
+    expect(actual).deep.equal(expectedVal);
   });
 });
+
+const stripAnsiCodes = str => {
+  return str.replace(
+    // eslint-disable-next-line security/detect-unsafe-regex, no-control-regex
+    /[\u001b\u009b][[()#;?]*(?:[0-9]{1,4}(?:;[0-9]{0,4})*)?[0-9A-ORZcf-nqry=><]/g,
+    ''
+  );
+};
+
+const replaceDateTimeISOString = str => {
+  return str.replace(
+    /^[0-9]{4}-((0[13578]|1[02])-(0[1-9]|[12][0-9]|3[01])|(0[469]|11)-(0[1-9]|[12][0-9]|30)|(02)-(0[1-9]|[12][0-9]))T(0[0-9]|1[0-9]|2[0-3]):(0[0-9]|[1-5][0-9]):(0[0-9]|[1-5][0-9])\.[0-9]{3}Z/,
+    ' '
+  );
+};
diff --git a/packages/operators/src/request/autoPagination.test.js b/packages/operators/src/request/autoPagination.test.js
index 365f63b..088bc53 100644
--- a/packages/operators/src/request/autoPagination.test.js
+++ b/packages/operators/src/request/autoPagination.test.js
@@ -28,11 +28,11 @@ describe('auto pagination', () => {
     const { autoPagination } = await import('./autoPagination');
 
     const expectedVal = {
-      a: { value: 'a', next: 'b' },
-      b: { value: 'b', next: 'c' },
-      c: { value: 'c', next: 'd' },
-      d: { value: 'd', next: 'e' },
-      e: { value: 'e', next: null }
+      a: { value: 'content a', next: 'b' },
+      b: { value: 'content b', next: 'c' },
+      c: { value: 'content c', next: 'd' },
+      d: { value: 'content d', next: 'e' },
+      e: { value: 'content e', next: null }
     };
 
     const triggerVal = {
diff --git a/packages/operators/src/request/concurrentRequest.test.js b/packages/operators/src/request/concurrentRequest.test.js
index aeb1595..bc0fc57 100644
--- a/packages/operators/src/request/concurrentRequest.test.js
+++ b/packages/operators/src/request/concurrentRequest.test.js
@@ -27,12 +27,20 @@ describe('concurrent request', () => {
   test('default', async () => {
     const { concurrentRequest } = await import('./concurrentRequest');
 
+    const expectedVal = {
+      a: 'content a',
+      b: 'content b',
+      c: 'content c',
+      d: 'content d',
+      e: 'content e'
+    };
+
     const triggerVal = {
-      a: { t: 2, v: new Response('a') },
-      b: { t: 5, v: new Response('b') },
-      c: { t: 1, v: new Response('c') },
-      d: { t: 3, v: new Response('d') },
-      e: { t: 4, v: new Response('e') }
+      a: { t: 2, v: new Response(expectedVal.a) },
+      b: { t: 5, v: new Response(expectedVal.b) },
+      c: { t: 1, v: new Response(expectedVal.c) },
+      d: { t: 3, v: new Response(expectedVal.d) },
+      e: { t: 4, v: new Response(expectedVal.e) }
     };
 
     testScheduler.run(({ cold, expectObservable }) => {
@@ -43,7 +51,7 @@ describe('concurrent request', () => {
           resolveText(),
           log('operators:request:concurrent:output')
         )
-      ).toBe('---a--c-(bd)--(e|)');
+      ).toBe('---a--c-(bd)--(e|)', expectedVal);
     });
   });
 });
diff --git a/packages/operators/src/request/lazyPagination.test.js b/packages/operators/src/request/lazyPagination.test.js
index 3533313..5d97ce1 100644
--- a/packages/operators/src/request/lazyPagination.test.js
+++ b/packages/operators/src/request/lazyPagination.test.js
@@ -38,11 +38,11 @@ describe('lazy pagination', () => {
     };
 
     const expectedVal = {
-      a: { value: '1' },
-      b: { value: '2' },
-      c: { value: '3' },
-      d: { value: '4' },
-      e: { value: '5' }
+      a: { value: 'content a' },
+      b: { value: 'content b' },
+      c: { value: 'content c' },
+      d: { value: 'content d' },
+      e: { value: 'content e' }
     };
 
     const responseVal = {
diff --git a/packages/operators/src/retry.test.js b/packages/operators/src/retry.test.js
index 7dbe3cd..d797f5c 100644
--- a/packages/operators/src/retry.test.js
+++ b/packages/operators/src/retry.test.js
@@ -1,6 +1,6 @@
 import { map } from 'rxjs';
 import { TestScheduler } from 'rxjs/testing';
-import { beforeEach, describe, expect, test } from 'vitest';
+import { afterAll, beforeEach, describe, expect, test, vi } from 'vitest';
 
 import { log } from './log';
 import { retryWhenRequestError } from './retry';
@@ -12,6 +12,10 @@ describe('request retry', () => {
     testScheduler = new TestScheduler((actual, expected) => expect(actual).deep.equal(expected));
   });
 
+  afterAll(() => {
+    vi.restoreAllMocks();
+  });
+
   test('2x error -> 1x success', () => {
     const expectedVal = {
       a: new Response('', { status: 500 }),
diff --git a/packages/operators/src/when.test.js b/packages/operators/src/when.test.js
index bd8e6b9..6525a96 100644
--- a/packages/operators/src/when.test.js
+++ b/packages/operators/src/when.test.js
@@ -1,6 +1,6 @@
 import { map } from 'rxjs';
 import { TestScheduler } from 'rxjs/testing';
-import { beforeEach, describe, expect, test } from 'vitest';
+import { afterAll, beforeEach, describe, expect, test, vi } from 'vitest';
 
 import { log } from './log';
 import { pipeWhen } from './when';
@@ -12,6 +12,10 @@ describe('when', () => {
     testScheduler = new TestScheduler((actual, expected) => expect(actual).deep.equal(expected));
   });
 
+  afterAll(() => {
+    vi.restoreAllMocks();
+  });
+
   test('default', () => {
     const triggerVal = {
       a: 1,