diff --git a/package.json b/package.json
index 398e686..89fd328 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,6 @@
   "devDependencies": {
     "gulp-format-md": "^2.0.0",
     "mocha": "^8.3.2",
-    "rxjs": "^6.6.7",
     "split-string": "^6.1.0"
   },
   "keywords": [
diff --git a/test/observables.js b/test/observables.js
deleted file mode 100644
index 8982f8b..0000000
--- a/test/observables.js
+++ /dev/null
@@ -1,53 +0,0 @@
-'use strict';
-
-const assert = require('assert').strict;
-const Rx = require('rxjs');
-const operators = require('rxjs/operators');
-const set = require('..');
-
-let _value = 0;
-let received = [];
-const o = { a: { b: {} } };
-const obs = Rx.from(new Rx.BehaviorSubject()).pipe(operators.skip(1));
-const noop = () => {};
-
-Object.defineProperty(o.a.b, 'c', {
-  configurable: true,
-  get() { return _value; },
-  set(value) {
-    _value = value;
-    obs.next(value);
-  }
-});
-
-describe('Setter with Observable', () => {
-  it('should only assign/emit once for each call of set', cb => {
-    const subs = obs.subscribe(data => { received.push(data); }, noop, () => {
-      assert.equal(received.length, 1);
-      cb();
-    });
-    set(o, 'a.b.c', 5);
-    subs.complete();
-  });
-
-  it('should work assignment via setter', cb => {
-    received = null;
-    const subs = obs.subscribe(data => { received = data; }, noop, () => {
-      assert.equal(received, 10);
-      cb();
-    });
-    set(o, 'a.b.c', 10);
-    subs.complete();
-  });
-
-  it('should work with merge of object via setter', cb => {
-    received = null;
-    set(o, 'a.b.c', { foo: 'bar' });
-    const subs = obs.subscribe(data => { received = data; }, noop, () => {
-      assert.deepEqual(o.a.b.c, { foo: 'bar', bing: 'bong' });
-      cb();
-    });
-    set(o, 'a.b.c', { bing: 'bong' }, { merge: true });
-    subs.complete();
-  });
-});