diff --git a/src/jimgw/single_event/runManager.py b/src/jimgw/single_event/runManager.py
index 034ae111..c1439b39 100644
--- a/src/jimgw/single_event/runManager.py
+++ b/src/jimgw/single_event/runManager.py
@@ -456,8 +456,8 @@ def plot_diagnostic(self, path: str = "diagnostic.jpeg", **kwargs):
         plt.savefig(path)
         plt.close()
 
-    def save_summary(self, path: str = None, **kwargs):
-        if path is None:
+    def save_summary(self, path: str = "", **kwargs):
+        if path == "":
             path = self.run.path + "run_manager_summary.txt"
         sys.stdout = open(path, "wt")
         self.jim.print_summary()