diff --git a/tests/test_domains/test_domain_cpp.py b/tests/test_domains/test_domain_cpp.py
index 98af279eb..19e5e0752 100644
--- a/tests/test_domains/test_domain_cpp.py
+++ b/tests/test_domains/test_domain_cpp.py
@@ -1826,7 +1826,7 @@ def test_domain_cpp_build_field_role(app):
 
 @pytest.mark.sphinx('html', testroot='domain-cpp', confoverrides={'nitpicky': True})
 def test_domain_cpp_build_operator_lookup(app):
-    app.builder.build_all()
+    app.build(force_all=True)
     ws = filter_warnings(app.warning, 'operator-lookup')
     assert len(ws) == 5
     # TODO: the first one should not happen
diff --git a/tests/test_extensions/test_ext_viewcode.py b/tests/test_extensions/test_ext_viewcode.py
index cb6b29859..01d68cd3c 100644
--- a/tests/test_extensions/test_ext_viewcode.py
+++ b/tests/test_extensions/test_ext_viewcode.py
@@ -173,7 +173,7 @@ def test_local_source_files(app):
 
 @pytest.mark.sphinx('html', testroot='ext-viewcode-find-package', freshenv=True)
 def test_find_local_package_import_path(app, status, warning):
-    app.builder.build_all()
+    app.build(force_all=True)
     result = (app.outdir / 'index.html').read_text(encoding='utf8')
 
     count_func1 = result.count(