diff --git a/vdirsyncer/cli/__init__.py b/vdirsyncer/cli/__init__.py
index b227164..772c124 100644
--- a/vdirsyncer/cli/__init__.py
+++ b/vdirsyncer/cli/__init__.py
@@ -203,6 +203,7 @@ def discover(ctx, pairs, max_workers):
     wq = WorkerQueue(max_workers)
 
     with wq.join():
+        print("PAIRS", pairs)
         for pair_name in (pairs or config.pairs):
             pair = config.get_pair(pair_name)
 
diff --git a/vdirsyncer/cli/config.py b/vdirsyncer/cli/config.py
index 0b9d30f..75ebd66 100644
--- a/vdirsyncer/cli/config.py
+++ b/vdirsyncer/cli/config.py
@@ -204,11 +204,16 @@ class PairConfig(object):
         self._config = config
         self.name = name
         self.name_a = name_a
-        self.name_a = name_b
+        self.name_b = name_b
         self.options = pair_options
 
-        self.config_a = config.get_storage_args(name_a, pair_name=name)
-        self.config_b = config.get_storage_args(name_b, pair_name=name)
+    @cached_property
+    def config_a(self):
+        return self._config.get_storage_args(self.name_a, pair_name=self.name)
+
+    @cached_property
+    def config_b(self):
+        return self._config.get_storage_args(self.name_b, pair_name=self.name)
 
 
 class CollectionConfig(object):