diff --git a/packages/langium/test/lsp/execute-command-handler.test.ts b/packages/langium/test/lsp/execute-command-handler.test.ts
index 7e83de5bd..74b3b9af3 100644
--- a/packages/langium/test/lsp/execute-command-handler.test.ts
+++ b/packages/langium/test/lsp/execute-command-handler.test.ts
@@ -4,8 +4,9 @@
  * terms of the MIT License, which is available in the project root.
  ******************************************************************************/
 
-import { AbstractExecuteCommandHandler, createServicesForGrammarWithLSP, type ExecuteCommandAcceptor } from 'langium/lsp';
+import { AbstractExecuteCommandHandler, type ExecuteCommandAcceptor } from '../../src/lsp/execute-command-handler.js';
 import { describe, expect, test } from 'vitest';
+import { createServicesForGrammarWithLSP } from '../../src/lsp/grammar-util.js';
 
 describe('AbstractExecuteCommandHandler', () => {
 
diff --git a/packages/langium/test/lsp/fuzzy-matcher.test.ts b/packages/langium/test/lsp/fuzzy-matcher.test.ts
index 773b662a8..d3598e44c 100644
--- a/packages/langium/test/lsp/fuzzy-matcher.test.ts
+++ b/packages/langium/test/lsp/fuzzy-matcher.test.ts
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 import { describe, expect, test } from 'vitest';
-import { DefaultFuzzyMatcher } from 'langium/lsp';
+import { DefaultFuzzyMatcher } from '../../src/lsp/fuzzy-matcher.js';
 
 const matcher = new DefaultFuzzyMatcher();
 
diff --git a/packages/langium/test/lsp/signatureHelpProvider.test.ts b/packages/langium/test/lsp/signatureHelpProvider.test.ts
index c23b11396..2282071d3 100644
--- a/packages/langium/test/lsp/signatureHelpProvider.test.ts
+++ b/packages/langium/test/lsp/signatureHelpProvider.test.ts
@@ -6,7 +6,7 @@
 
 import type { SignatureHelpOptions } from 'vscode-languageserver';
 import { describe, expect, test } from 'vitest';
-import { mergeSignatureHelpOptions } from 'langium/lsp';
+import { mergeSignatureHelpOptions } from '../../src/lsp/signature-help-provider.js';
 
 describe('MergeSignatureHelpOptions', () => {
     test('Must merge SignatureHelpOptions triggerCharacters', async () => {