diff --git a/modules/entity/spec/types/entity_adapter.spec.ts b/modules/entity/spec/types/entity_adapter.spec.ts
deleted file mode 100644
index 317b86c99b..0000000000
--- a/modules/entity/spec/types/entity_adapter.spec.ts
+++ /dev/null
@@ -1,68 +0,0 @@
-import { expecter } from 'ts-snippet';
-import { compilerOptions } from './utils';
-
-describe('EntityAdapter Types', () => {
-  const expectSnippet = expecter(
-    (code) => `
-        import { EntityState, createEntityAdapter, EntityAdapter } from '@ngrx/entity';
-
-        interface EntityWithStringId {
-          id: string;
-        }
-
-        interface EntityWithNumberId {
-          id: number;
-        }
-
-        interface EntityWithoutId {
-          key: number;
-        }
-
-
-        ${code}
-      `,
-    compilerOptions()
-  );
-
-  it('sets the id type to string when the entity has a string id', () => {
-    expectSnippet(`
-        export const adapter: EntityAdapter<EntityWithStringId, string> = createEntityAdapter<EntityWithStringId>();
-      `).toSucceed();
-  });
-
-  it('sets the id type to number when the entity has a number id', () => {
-    expectSnippet(`
-        export const adapter: EntityAdapter<EntityWithNumberId, number> = createEntityAdapter<EntityWithNumberId>();
-      `).toSucceed();
-  });
-
-  it('sets the id type to string when selectId returns a string', () => {
-    expectSnippet(`
-        export const adapter: EntityAdapter<EntityWithNumberId, string> = createEntityAdapter<EntityWithNumberId>({
-          selectId: (entity) => entity.id.toString(),
-        });
-      `).toSucceed();
-  });
-
-  it('sets the id type to string | number when the entity has no id and no selectId is provided', () => {
-    expectSnippet(`
-        export const adapter: EntityAdapter<EntityWithoutId, string | number> = createEntityAdapter<EntityWithoutId>();
-      `).toSucceed();
-  });
-
-  it('sets the id type to correct type if selectId is provided', () => {
-    expectSnippet(`
-        export const adapter: EntityAdapter<EntityWithoutId, string> = createEntityAdapter<EntityWithoutId>({
-          selectId: (entity) => entity.key.toString(),
-        });
-      `).toSucceed();
-  });
-
-  it('sets the id type to string when selectId returns a string', () => {
-    expectSnippet(`
-        export const adapter: EntityAdapter<EntityWithNumberId, string> = createEntityAdapter<EntityWithNumberId>({
-          selectId: (entity) => entity.id.toString(),
-        });
-      `).toSucceed();
-  });
-}, 8_000);
diff --git a/modules/entity/spec/types/entity_adapter.test-d.ts b/modules/entity/spec/types/entity_adapter.test-d.ts
new file mode 100644
index 0000000000..0d6a51fc05
--- /dev/null
+++ b/modules/entity/spec/types/entity_adapter.test-d.ts
@@ -0,0 +1,60 @@
+import { expectTypeOf, describe, it } from 'vitest';
+import { createEntityAdapter, EntityAdapter } from '../..';
+
+interface EntityWithStringId {
+  id: string;
+}
+
+interface EntityWithNumberId {
+  id: number;
+}
+
+interface EntityWithoutId {
+  key: number;
+}
+
+describe('EntityAdapter Types', () => {
+  it('sets the id type to string when the entity has a string id', () => {
+    const adapter = createEntityAdapter<EntityWithStringId>();
+
+    expectTypeOf(adapter).toEqualTypeOf<
+      EntityAdapter<EntityWithStringId, string>
+    >();
+  });
+
+  it('sets the id type to number when the entity has a number id', () => {
+    const adapter = createEntityAdapter<EntityWithNumberId>();
+
+    expectTypeOf(adapter).toEqualTypeOf<
+      EntityAdapter<EntityWithNumberId, number>
+    >();
+  });
+
+  it('sets the id type to string when selectId returns a string', () => {
+    const adapter = createEntityAdapter<EntityWithNumberId>({
+      selectId: (entity) => entity.id.toString(),
+    });
+
+    expectTypeOf(adapter).toEqualTypeOf<
+      EntityAdapter<EntityWithNumberId, string>
+    >();
+  });
+
+  it('sets the id type to string | number when the entity has no id and no selectId is provided', () => {
+    const adapter = createEntityAdapter<EntityWithoutId>();
+
+    expectTypeOf(adapter).toEqualTypeOf<
+      EntityAdapter<EntityWithoutId, string | number>
+    >();
+  });
+
+  it('sets the id type to correct type if selectId is provided', () => {
+    const adapter = createEntityAdapter<EntityWithoutId>({
+      selectId: (entity) => entity.key.toString(),
+    });
+
+    expectTypeOf(adapter).toEqualTypeOf<
+      EntityAdapter<EntityWithoutId, string>
+    >();
+  });
+});
diff --git a/modules/entity/spec/types/entity_adapter.types.spec.ts b/modules/entity/spec/types/entity_adapter.types.spec.ts
new file mode 100644
index 0000000000..c7ccb70543
--- /dev/null
+++ b/modules/entity/spec/types/entity_adapter.types.spec.ts
@@ -0,0 +1,15 @@
+import { it, describe } from 'vitest';
+import { createEntityAdapter } from '../..';
+
+interface EntityWithoutId {
+  key: number;
+}
+
+describe('EntityAdapter Types', () => {
+  it('throws when selectId returns an invalid id type', () => {
+    createEntityAdapter<EntityWithoutId>({
+      // @ts-expect-error Type 'boolean' is not assignable to type 'string | number'
+      selectId: (entity) => entity.key > 0,
+    });
+  });
+});
diff --git a/modules/entity/spec/types/entity_selectors.test-d.ts b/modules/entity/spec/types/entity_selectors.test-d.ts
new file mode 100644
index 0000000000..0f1bb02082
--- /dev/null
+++ b/modules/entity/spec/types/entity_selectors.test-d.ts
@@ -0,0 +1,20 @@
+import { Selector } from '@ngrx/store';
+import { expectTypeOf, describe, it } from 'vitest';
+import { EntitySelectors } from '../..';
+
+describe('EntitySelectors', () => {
+  it('is compatible with a dictionary of selectors', () => {
+    type SelectorsDictionary = Record<
+      string,
+      | Selector<Record<string, any>, unknown>
+      | ((...args: any[]) => Selector<Record<string, any>, unknown>)
+    >;
+    type ExtendsSelectorsDictionary<T> = T extends SelectorsDictionary
+      ? true
+      : false;
+
+    expectTypeOf<
+      ExtendsSelectorsDictionary<EntitySelectors<unknown, Record<string, any>>>
+    >().toEqualTypeOf<true>();
+  });
+});
diff --git a/modules/entity/spec/types/entity_selectors.types.spec.ts b/modules/entity/spec/types/entity_selectors.types.spec.ts
deleted file mode 100644
index 166f37d0e8..0000000000
--- a/modules/entity/spec/types/entity_selectors.types.spec.ts
+++ /dev/null
@@ -1,31 +0,0 @@
-import { expecter } from 'ts-snippet';
-import { compilerOptions } from './utils';
-
-describe('EntitySelectors', () => {
-  const expectSnippet = expecter(
-    (code) => `
-        import { Selector } from '@ngrx/store';
-        import { EntitySelectors } from './modules/entity/src/models';
-
-        ${code}
-      `,
-    compilerOptions()
-  );
-
-  it('is compatible with a dictionary of selectors', () => {
-    expectSnippet(`
-      type SelectorsDictionary = Record<
-        string,
-        | Selector<Record<string, any>, unknown>
-        | ((...args: any[]) => Selector<Record<string, any>, unknown>)
-      >;
-      type ExtendsSelectorsDictionary<T> = T extends SelectorsDictionary
-        ? true
-        : false;
-
-      let result: ExtendsSelectorsDictionary<
-        EntitySelectors<unknown, Record<string, any>>
-      >;
-    `).toInfer('result', 'true');
-  });
-}, 8_000);
diff --git a/modules/entity/spec/types/entity_state.test-d.ts b/modules/entity/spec/types/entity_state.test-d.ts
new file mode 100644
index 0000000000..08dd13a3d9
--- /dev/null
+++ b/modules/entity/spec/types/entity_state.test-d.ts
@@ -0,0 +1,42 @@
+import { expectTypeOf, describe, it } from 'vitest';
+import { createEntityAdapter, EntityAdapter, EntityState } from '../..';
+
+interface Book {
+  id: string;
+  title: string;
+}
+
+interface BookState extends EntityState<Book> {
+  selectedBookId: string | null;
+}
+
+const adapter: EntityAdapter<Book> = createEntityAdapter<Book>();
+
+describe('EntityState Types', () => {
+  describe('getInitialState', () => {
+    it('can set the initial state', () => {
+      const initialState: BookState = adapter.getInitialState({
+        selectedBookId: '1',
+      });
+
+      expectTypeOf(initialState).toEqualTypeOf<BookState>();
+    });
+
+    it('can set the initial state with additional properties', () => {
+      const initialState: BookState = adapter.getInitialState({
+        selectedBookId: '1',
+      });
+
+      expectTypeOf(initialState).toEqualTypeOf<BookState>();
+    });
+
+    it('can set the initial state with unknown properties when the state is untyped', () => {
+      const initialState = adapter.getInitialState({
+        selectedBookId: '1',
+        otherProperty: 'value',
+      });
+
+      expectTypeOf(initialState).toExtend<EntityState<Book>>();
+    });
+  });
+});
diff --git a/modules/entity/spec/types/entity_state.types.spec.ts b/modules/entity/spec/types/entity_state.types.spec.ts
index 24d831bbf5..7ec8e016b9 100644
--- a/modules/entity/spec/types/entity_state.types.spec.ts
+++ b/modules/entity/spec/types/entity_state.types.spec.ts
@@ -1,63 +1,25 @@
-import { expecter } from 'ts-snippet';
-import { compilerOptions } from './utils';
+import { it, describe } from 'vitest';
+import { createEntityAdapter, EntityAdapter, EntityState } from '../..';
 
-describe('EntityState Types', () => {
-  const expectSnippet = expecter(
-    (code) => `
-        import { EntityState, createEntityAdapter, EntityAdapter } from '@ngrx/entity';
-
-        interface Book {
-          id: string;
-          title: string;
-        }
+interface Book {
+  id: string;
+  title: string;
+}
 
-        interface BookState extends EntityState<Book> {
-          selectedBookId: string | null;
-        }
+interface BookState extends EntityState<Book> {
+  selectedBookId: string | null;
+}
 
-        export const adapter: EntityAdapter<Book> = createEntityAdapter<Book>();
-        ${code}
-      `,
-    compilerOptions()
-  );
+const adapter: EntityAdapter<Book> = createEntityAdapter<Book>();
 
+describe('EntityState Types', () => {
   describe('getInitialState', () => {
-    it('can set the initial state', () => {
-      expectSnippet(`
-        export const initialState: BookState = adapter.getInitialState({
-          selectedBookId: '1',
-        });
-
-      `).toSucceed();
-    });
-
-    it('can set the initial state with additional properties', () => {
-      expectSnippet(`
-        export const initialState: BookState = adapter.getInitialState({
-          selectedBookId: '1',
-        });
-
-      `).toSucceed();
-    });
-
     it('throws when setting the initial state with unknown properties', () => {
-      expectSnippet(`
-        export const initialState: BookState = adapter.getInitialState({
-          selectedBookId: '1',
-          otherProperty: 'value',
-        });
-      `).toFail(
-        /Object literal may only specify known properties, and 'otherProperty' does not exist in type 'Omit<BookState, keyof EntityState<T>>'/i
-      );
-    });
-
-    it('can set the initial state with unknown properties when the state is untyped', () => {
-      expectSnippet(`
-        export const initialState = adapter.getInitialState({
-          selectedBookId: '1',
-          otherProperty: 'value',
-        });
-      `).toSucceed();
+      adapter.getInitialState<BookState>({
+        selectedBookId: '1',
+        // @ts-expect-error Object literal may only specify known properties, and 'otherProperty' does not exist in type 'Omit<BookState, keyof EntityState<T>>'
+        otherProperty: 'value',
+      });
     });
   });
-}, 8_000);
+});
diff --git a/modules/entity/spec/types/utils.ts b/modules/entity/spec/types/utils.ts
deleted file mode 100644
index a1ddc21fa9..0000000000
--- a/modules/entity/spec/types/utils.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-export const compilerOptions = () => ({
-  module: 'preserve',
-  moduleResolution: 'bundler',
-  target: 'ES2022',
-  baseUrl: '.',
-  ignoreDeprecations: '6.0',
-  experimentalDecorators: true,
-  strict: true,
-  paths: {
-    '@ngrx/entity': ['./modules/entity'],
-    '@ngrx/store': ['./modules/store'],
-  },
-});