diff --git a/tests/unit/unittest/clangqueryprojectfindfilter-test.cpp b/tests/unit/unittest/clangqueryprojectfindfilter-test.cpp
index 66654e038f6..af4705371c7 100644
--- a/tests/unit/unittest/clangqueryprojectfindfilter-test.cpp
+++ b/tests/unit/unittest/clangqueryprojectfindfilter-test.cpp
@@ -161,11 +161,11 @@ TEST_F(ClangQueryProjectFindFilter, CancelSearch)
 std::vector<CppTools::ProjectPart::Ptr> createProjectParts()
 {
     auto projectPart1 = CppTools::ProjectPart::Ptr(new CppTools::ProjectPart);
-    projectPart1->files.append({"/path/to/file1.h", CppTools::ProjectFile::CXXSource});
-    projectPart1->files.append({"/path/to/file1.cpp", CppTools::ProjectFile::CXXHeader});
+    projectPart1->files.append({"/path/to/file1.h", CppTools::ProjectFile::CXXHeader});
+    projectPart1->files.append({"/path/to/file1.cpp", CppTools::ProjectFile::CXXSource});
 
     auto projectPart2 = CppTools::ProjectPart::Ptr(new CppTools::ProjectPart);
-    projectPart1->files.append({"/path/to/file2.cpp", CppTools::ProjectFile::CXXHeader});
+    projectPart1->files.append({"/path/to/file2.cpp", CppTools::ProjectFile::CXXSource});
     projectPart1->files.append({"/path/to/unsaved.cpp", CppTools::ProjectFile::CXXSource});
 
     return {projectPart1, projectPart2};