diff --git a/snakemake/executors/common.py b/snakemake/executors/common.py
index 8f0145dd2..901c4d195 100644
--- a/snakemake/executors/common.py
+++ b/snakemake/executors/common.py
@@ -12,10 +12,10 @@ def format_cli_arg(flag, value, quote=True, skip=False):
 
 
 def format_cli_pos_arg(value, quote=True):
-    if not_iterable(value):
+    if isinstance(value, dict):
+        return join_cli_args(repr(f"{key}={val}") for key, val in value.items())
+    elif not_iterable(value):
         return repr(value)
-    elif isinstance(value, dict):
-        return join_cli_args(repr(f"{key}={val}") for key, val in value)
     else:
         return join_cli_args(repr(v) for v in value)