diff --git a/src/actions/__tests__/sponsor-purchases-actions.test.js b/src/actions/__tests__/sponsor-purchases-actions.test.js
index 1a5c58868..705c0a655 100644
--- a/src/actions/__tests__/sponsor-purchases-actions.test.js
+++ b/src/actions/__tests__/sponsor-purchases-actions.test.js
@@ -46,6 +46,12 @@ jest.mock("openstack-uicore-foundation/lib/utils/actions", () => ({
   }))
 }));
 
+// webpack inlines this asset as a data URI, the generic png file mock would return {}
+jest.mock(
+  "../../assets/fn-invoice-header.png",
+  () => "data:image/png;base64,TEST"
+);
+
 jest.mock(
   "openstack-uicore-foundation/lib/components/order-invoice-pdf",
   () => ({
@@ -93,7 +99,9 @@ describe("downloadSponsorInvoice", () => {
     expect(generateInvoicePDF).toHaveBeenCalledWith(
       fetchedOrder,
       { id: 1 },
-      expect.objectContaining({ logoSrc: expect.anything() })
+      expect.objectContaining({
+        logoSrc: expect.stringMatching(/^data:image\/png;base64,/)
+      })
     );
     expect(snackbarErrorMsg).not.toHaveBeenCalled();
   });
diff --git a/webpack.common.js b/webpack.common.js
index 852d1b239..63471b5ea 100644
--- a/webpack.common.js
+++ b/webpack.common.js
@@ -120,8 +120,14 @@ module.exports = {
         test: /\.(woff|woff2|eot|ttf|otf)$/i,
         type: "asset/resource"
       },
+      {
+        // inline the invoice logo so react-pdf never fetches it (CDN may serve WebP, react-pdf caches failures)
+        test: /fn-invoice-header\.png$/,
+        type: "asset/inline"
+      },
       {
         test: /\.jpg|\.png|\.gif$/,
+        exclude: /fn-invoice-header\.png$/,
         use: "file-loader?name=images/[name].[ext]"
       },
       {