diff --git a/frontend/resources/__tests__/before_each_test.ts b/frontend/resources/__tests__/before_each_test.ts
new file mode 100644
index 000000000..401443f07
--- /dev/null
+++ b/frontend/resources/__tests__/before_each_test.ts
@@ -0,0 +1,56 @@
+import { beforeEach } from "../reducer_support";
+import { ReduxAction } from "../../redux/interfaces";
+import { Actions } from "../../constants";
+import { fakeWebAppConfig } from "../../__test_support__/fake_state/resources";
+import { buildResourceIndex } from "../../__test_support__/resource_index_builder";
+
+describe("beforeEach", () => {
+  const emptyHandler = <T>(s: T): T => s;
+
+  const readonlyState = () => {
+    const config = fakeWebAppConfig();
+    config.body.user_interface_read_only_mode = true;
+    return buildResourceIndex([config]);
+  };
+
+  it("Can modify WebAppConfigs, even when in read-only mode", () => {
+    const state = readonlyState();
+    const action: ReduxAction<{}> =
+      ({ type: Actions.EDIT_RESOURCE, payload: { uuid: "WebAppConfig.99.99" } });
+    const handler = jest.fn(emptyHandler);
+    beforeEach(state, action, handler);
+    expect(handler).toHaveBeenCalledWith(state, action);
+  });
+
+  it("Cannot modify resources in readonly mode", () => {
+    // === Don't allow EDIT_RESOURCE
+    const state = readonlyState();
+    const action: ReduxAction<{}> =
+      ({ type: Actions.EDIT_RESOURCE, payload: { uuid: "Sequence.99.99" } });
+    const handler = jest.fn(emptyHandler);
+    expect(beforeEach(state, action, handler)).toBe(state);
+    expect(handler).not.toHaveBeenCalledWith(state, action);
+
+    // === Allow SAVE_RESOURCE_START, but warn user.
+    const entryList: [Actions, boolean][] = [
+      [Actions.SAVE_RESOURCE_START, true],
+      [Actions.REFRESH_RESOURCE_OK, true],
+      [Actions.BATCH_INIT, false],
+      [Actions.INIT_RESOURCE, false],
+      [Actions.OVERWRITE_RESOURCE, false],
+    ];
+
+    entryList.map(([type, shouldCall]) => {
+      handler.mockClear();
+      const action2 = { ...action, type };
+      // Don't use `toEqual` here.
+      // I'm testing object identity rather than just equality.
+      expect(beforeEach(state, action2, handler)).toEqual(state);
+      if (shouldCall) {
+        expect(handler).toHaveBeenCalledWith(state, action2);
+      } else {
+        expect(handler).not.toHaveBeenCalledWith(state, action2);
+      }
+    });
+  });
+});
diff --git a/frontend/resources/reducer_support.ts b/frontend/resources/reducer_support.ts
index 88f79a72c..dc7ee35f2 100644
--- a/frontend/resources/reducer_support.ts
+++ b/frontend/resources/reducer_support.ts
@@ -261,8 +261,6 @@ export const beforeEach = (state: RestResources,
     return handler(state, action);
   }
   const fail = (place: string) => {
-    console.log(action.type);
-    console.dir(action);
     warning(`(${place}) Can't modify account data when in read-only mode.`);
   };
   const { kind } = unpackUUID(get(action, "payload.uuid", "x.y.z"));