diff --git a/projects/cdk/components/portal-host/test/portal-host.component.spec.ts b/projects/cdk/components/portal-host/test/portal-host.component.spec.ts
new file mode 100644
index 000000000000..42446c538f51
--- /dev/null
+++ b/projects/cdk/components/portal-host/test/portal-host.component.spec.ts
@@ -0,0 +1,47 @@
+import {Component, ViewChild} from '@angular/core';
+import {ComponentFixture, TestBed} from '@angular/core/testing';
+import {NoopAnimationsModule} from '@angular/platform-browser/animations';
+import {PolymorpheusModule} from '@tinkoff/ng-polymorpheus';
+import {configureTestSuite} from 'ng-bullet';
+import {TuiPortalHostComponent} from '../portal-host.component';
+import {TuiPortalHostModule} from '../portal-host.module';
+
+describe('PortalHost', () => {
+    @Component({
+        template: `
+            <tui-portal-host>
+                <button>Content</button>
+            </tui-portal-host>
+        `,
+    })
+    class TestComponent {
+        @ViewChild(TuiPortalHostComponent)
+        portalHost?: TuiPortalHostComponent;
+    }
+
+    let fixture: ComponentFixture<TestComponent>;
+    let testComponent: TestComponent;
+
+    configureTestSuite(() => {
+        TestBed.configureTestingModule({
+            imports: [NoopAnimationsModule, PolymorpheusModule, TuiPortalHostModule],
+            declarations: [TestComponent],
+        });
+    });
+
+    beforeEach(() => {
+        fixture = TestBed.createComponent(TestComponent);
+        testComponent = fixture.componentInstance;
+        fixture.detectChanges();
+    });
+
+    it('calculates clientRect', () => {
+        expect(testComponent.portalHost!.clientRect.top).toBeGreaterThanOrEqual(0);
+    });
+
+    it('calculates fixedPositionOffset', () => {
+        expect(
+            testComponent.portalHost!.fixedPositionOffset().top,
+        ).toBeGreaterThanOrEqual(0);
+    });
+});
diff --git a/projects/cdk/components/portal-host/test/portal.service.spec.ts b/projects/cdk/components/portal-host/test/portal.service.spec.ts
new file mode 100644
index 000000000000..15ab3bb70e0b
--- /dev/null
+++ b/projects/cdk/components/portal-host/test/portal.service.spec.ts
@@ -0,0 +1,47 @@
+import {TuiPortalService} from '../portal.service';
+
+describe('PortalService', () => {
+    let service: TuiPortalService;
+
+    beforeEach(() => {
+        service = new TuiPortalService();
+    });
+
+    it('Template removing', () => {
+        let called = 0;
+        const viewRefStub: any = {destroy: () => called++};
+
+        service.removeTemplate(viewRefStub);
+    });
+
+    it('HostView removing', () => {
+        let called = 0;
+        const componentRefStub: any = {hostView: {destroy: () => called++}};
+
+        service.remove(componentRefStub);
+    });
+
+    it('throws an error with no host', () => {
+        const a: any = null;
+        const b: any = null;
+
+        try {
+            service.add(a, b);
+            fail();
+        } catch (e) {
+            expect(e).toBeTruthy();
+        }
+    });
+
+    it('addTemplateChild with host attached', () => {
+        const a: any = null;
+        const result = {};
+        const componentPortalStub: any = {
+            addTemplateChild: () => result,
+        };
+
+        service.attach(componentPortalStub);
+
+        expect(service.addTemplate(a)).toBe(result as any);
+    });
+});
diff --git a/projects/cdk/observables/test/watch.spec.ts b/projects/cdk/observables/test/watch.spec.ts
new file mode 100644
index 000000000000..016fbb2cef96
--- /dev/null
+++ b/projects/cdk/observables/test/watch.spec.ts
@@ -0,0 +1,26 @@
+import {fakeAsync, tick} from '@angular/core/testing';
+import {Subject} from 'rxjs';
+import {watch} from '../watch';
+
+describe('Watch operator function', () => {
+    let $: Subject<any>;
+    let called = 0;
+
+    const chrStub: any = {
+        markForCheck: () => called++,
+    };
+
+    beforeEach(() => {
+        $ = new Subject<any>();
+        called = 0;
+    });
+
+    it('initially emits nothing, after event emits "true" and after a tick emits "false"', fakeAsync(() => {
+        $.pipe(watch(chrStub)).subscribe();
+
+        $.next();
+        tick();
+
+        expect(called).toBe(1);
+    }));
+});