--- a/configmix/config.py	Mon Dec 20 02:00:03 2021 +0100
+++ b/configmix/config.py	Mon Dec 20 12:43:17 2021 +0100
@@ -753,7 +753,7 @@
         ty = type(obj)
         if issubclass(ty, _TEXTTYPE):
             # a string - really replace the value
-            return self.expand_variable(obj)
+            return self.interpolate_variables(obj)
         elif issubclass(ty, dict):
             newdict = ty()
             for k, v in obj.items():
@@ -770,8 +770,8 @@
         else:
             return obj
 
-    def expand_variable(self, s):
-        """Expand variables in the single string `s`"""
+    def interpolate_variables(self, s):
+        """Expand all variables in the single string `s`"""
         start = s.find(_STARTTOK, 0)
         if start < 0:
             return s