diff --git a/support/testing/infra/basetest.py b/support/testing/infra/basetest.py
index 12d96415da..1ae6232da8 100644
--- a/support/testing/infra/basetest.py
+++ b/support/testing/infra/basetest.py
@@ -37,6 +37,7 @@ class BRConfigTest(unittest.TestCase):
         super(BRConfigTest, self).__init__(names)
         self.testname = self.__class__.__name__
         self.builddir = self.outputdir and os.path.join(self.outputdir, self.testname)
+        self.config += '\nBR2_BACKUP_SITE=""\n'
         self.config += '\nBR2_DL_DIR="{}"\n'.format(self.downloaddir)
         self.config += "\nBR2_JLEVEL={}\n".format(self.jlevel)
 
diff --git a/support/testing/tests/download/test_git.py b/support/testing/tests/download/test_git.py
index ba52e03ef5..3cf98f6456 100644
--- a/support/testing/tests/download/test_git.py
+++ b/support/testing/tests/download/test_git.py
@@ -7,10 +7,7 @@ import infra
 
 
 class GitTestBase(infra.basetest.BRConfigTest):
-    config = \
-        """
-        BR2_BACKUP_SITE=""
-        """
+    config = ""
     gitremotedir = infra.filepath("tests/download/git-remote")
     gitremote = None
 
diff --git a/support/testing/tests/download/test_gitforge.py b/support/testing/tests/download/test_gitforge.py
index e1ac35ec67..477c365a34 100644
--- a/support/testing/tests/download/test_gitforge.py
+++ b/support/testing/tests/download/test_gitforge.py
@@ -5,10 +5,7 @@ import infra
 
 
 class GitforgeTestBase(infra.basetest.BRConfigTest):
-    config = \
-        """
-        BR2_BACKUP_SITE=""
-        """
+    config = ""
 
     def setUp(self):
         super(GitforgeTestBase, self).setUp()
diff --git a/support/testing/tests/download/test_ssh.py b/support/testing/tests/download/test_ssh.py
index 126002a355..7d6ac3aaf7 100644
--- a/support/testing/tests/download/test_ssh.py
+++ b/support/testing/tests/download/test_ssh.py
@@ -7,9 +7,7 @@ import infra
 
 
 class SSHTestBase(infra.basetest.BRConfigTest):
-    config = infra.basetest.MINIMAL_CONFIG + '''
-BR2_BACKUP_SITE=""
-'''
+    config = infra.basetest.MINIMAL_CONFIG
     sshd_test_dir = infra.filepath("tests/download/sshd")
     sshd = None
 
diff --git a/support/testing/tests/package/test_rust.py b/support/testing/tests/package/test_rust.py
index 763125ca20..8160cb6053 100644
--- a/support/testing/tests/package/test_rust.py
+++ b/support/testing/tests/package/test_rust.py
@@ -70,7 +70,6 @@ class TestRustVendoring(infra.basetest.BRConfigTest):
         BR2_PACKAGE_RIPGREP=y
         BR2_PACKAGE_PYTHON3=y
         BR2_PACKAGE_PYTHON_CRYPTOGRAPHY=y
-        BR2_BACKUP_SITE=""
         """
 
     def setUp(self):