diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index db6294b49a34..d347ad6183ad 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -1457,9 +1457,7 @@ in
   syncthing-guiPassword = runTest ./syncthing/guiPassword.nix;
   syncthing-guiPasswordFile = runTest ./syncthing/guiPasswordFile.nix;
   syncthing-init = runTest ./syncthing/init.nix;
-  # FIXME: Test has been failing since 2025-07-06:
-  # https://github.com/NixOS/nixpkgs/issues/447674
-  # syncthing-many-devices = runTest ./syncthing/many-devices.nix;
+  syncthing-many-devices = runTest ./syncthing/many-devices.nix;
   syncthing-no-settings = runTest ./syncthing/no-settings.nix;
   syncthing-relay = runTest ./syncthing/relay.nix;
   sysfs = runTest ./sysfs.nix;
diff --git a/nixos/tests/syncthing/many-devices.nix b/nixos/tests/syncthing/many-devices.nix
index 0c704b3d4048..b69c06181c9a 100644
--- a/nixos/tests/syncthing/many-devices.nix
+++ b/nixos/tests/syncthing/many-devices.nix
@@ -138,12 +138,26 @@ let
         (printf "X-API-Key: "; cat "$RUNTIME_DIRECTORY/api_key") >"$RUNTIME_DIRECTORY/headers"
 
         ${pkgs.curl}/bin/curl -sSLk -H "@$RUNTIME_DIRECTORY/headers" \
-            --retry 1000 --retry-delay 1 --retry-all-errors \
+            --retry 5 --retry-delay 1 --retry-all-errors \
             "$@"
     }
-    curl -d ${lib.escapeShellArg (builtins.toJSON { deviceID = IDsToDelete.device; })} \
+    curl -d ${
+      lib.escapeShellArg (
+        builtins.toJSON {
+          deviceID = IDsToDelete.device;
+          name = "DeleteMe";
+        }
+      )
+    } \
         -X POST 127.0.0.1:8384/rest/config/devices
-    curl -d ${lib.escapeShellArg (builtins.toJSON { id = IDsToDelete.folder; })} \
+    curl -d ${
+      lib.escapeShellArg (
+        builtins.toJSON {
+          id = IDsToDelete.folder;
+          path = "/var/lib/syncthing/DeleteMe";
+        }
+      )
+    } \
         -X POST 127.0.0.1:8384/rest/config/folders
   '';
 in