diff --git a/meta/lib/oeqa/selftest/imagefeatures.py b/meta/lib/oeqa/selftest/imagefeatures.py
index fcffc42..4efb0d9 100644
--- a/meta/lib/oeqa/selftest/imagefeatures.py
+++ b/meta/lib/oeqa/selftest/imagefeatures.py
@@ -25,9 +25,7 @@
         features = 'EXTRA_IMAGE_FEATURES = "ssh-server-openssh empty-root-password allow-empty-password"\n'
         features += 'INHERIT += "extrausers"\n'
         features += 'EXTRA_USERS_PARAMS = "useradd -p \'\' {}; usermod -s /bin/sh {};"'.format(self.test_user, self.test_user)
-
-        # Append 'features' to local.conf
-        self.append_config(features)
+        self.write_config(features)
 
         # Build a core-image-minimal
         bitbake('core-image-minimal')
@@ -53,9 +51,7 @@
         features = 'EXTRA_IMAGE_FEATURES = "ssh-server-openssh allow-empty-password"\n'
         features += 'INHERIT += "extrausers"\n'
         features += 'EXTRA_USERS_PARAMS = "useradd -p \'\' {}; usermod -s /bin/sh {};"'.format(self.test_user, self.test_user)
-
-        # Append 'features' to local.conf
-        self.append_config(features)
+        self.write_config(features)
 
         # Build a core-image-minimal
         bitbake('core-image-minimal')
@@ -87,9 +83,7 @@
         features += 'IMAGE_INSTALL_append = " openssh"\n'
         features += 'EXTRA_IMAGE_FEATURES = "empty-root-password allow-empty-password package-management"\n'
         features += 'RPMROOTFSDEPENDS_remove = "rpmresolve-native:do_populate_sysroot"'
-
-        # Append 'features' to local.conf
-        self.append_config(features)
+        self.write_config(features)
 
         # Build a core-image-minimal
         bitbake('core-image-minimal')
@@ -159,9 +153,7 @@
 
         features = 'DISTRO_FEATURES_append = " wayland"\n'
         features += 'CORE_IMAGE_EXTRA_INSTALL += "wayland weston"'
-
-        # Append 'features' to local.conf
-        self.append_config(features)
+        self.write_config(features)
 
         # Build a core-image-weston
         bitbake('core-image-weston')