diff --git a/packages/hxtorch/package.py b/packages/hxtorch/package.py
index c84905874a58e6f874ccae12fbc84769a94e147b..77c76150fb63f47bf1599d50df20b8cf3e885ff8 100644
--- a/packages/hxtorch/package.py
+++ b/packages/hxtorch/package.py
@@ -155,7 +155,7 @@ class Hxtorch(WafPackage):
         return args
 
     def build_test(self):
-        self.waf('build', '--test-execall')
+        self.builder.waf('build', '--test-execall')
 
     def install_args(self):
         args = ['--test-execnone']
diff --git a/packages/pynn-brainscales/package.py b/packages/pynn-brainscales/package.py
index a5290d9e83aa8041a69d779b2c21488a23e8175b..9730f6c9302c2cd44f4c942448cf891224e16d9f 100644
--- a/packages/pynn-brainscales/package.py
+++ b/packages/pynn-brainscales/package.py
@@ -131,7 +131,7 @@ class PynnBrainscales(WafPackage):
         return args
 
     def build_test(self):
-        self.waf('build', '--test-execall')
+        self.builder.waf('build', '--test-execall')
 
     def install_args(self):
         args = ['--test-execnone']