diff --git a/tests/docx-roundtrip.test.ts b/tests/docx-roundtrip.test.ts
index 16f98ab..29623c5 100644
--- a/tests/docx-roundtrip.test.ts
+++ b/tests/docx-roundtrip.test.ts
@@ -7,7 +7,7 @@ import { HEADER_SHADE } from '../src/lib/editor/extensions/tableHeaderRow';
 
 type N = { type: string; attrs?: any; content?: N[]; marks?: any[]; text?: string };
 
-const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYPhfDwAChwGA60e6kgAAAABJRU5ErkJggg==';
+const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR4nGNwaDgAAAKEAYEml6crAAAAAElFTkSuQmCC';
 
 const text = (t: string, marks?: any[]) => ({ type: 'text', text: t, ...(marks ? { marks } : {}) });
 const para = (content: any, attrs: any = {}) => ({ type: 'paragraph', attrs, content: Array.isArray(content) ? content : [text(content)] });
@@ -429,7 +429,7 @@ describe('DOCX different first page (w:titlePg)', () => {
   });
 
   it('round-trips an inline image in the default footer and the first-page header', async () => {
-    const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==';
+    const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR4nGNwaDgAAAKEAYEml6crAAAAAElFTkSuQmCC';
     const image = (w: number, h: number): N => ({ type: 'image', attrs: { src: PNG, alt: 'Logo', width: w, height: h, wrap: 'inline' } });
     const withImgs = {
       ...hf,
diff --git a/tests/fuzzDoc.ts b/tests/fuzzDoc.ts
index 740471c..36fe03f 100644
--- a/tests/fuzzDoc.ts
+++ b/tests/fuzzDoc.ts
@@ -344,7 +344,7 @@ function list(r: Rng, kind: 'bulletList' | 'orderedList', depth: number,
 }
 
 // A tiny valid PNG; only its bytes matter for the round-trip (no image decoding).
-const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAC0lEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==';
+const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR4nGNwaDgAAAKEAYEml6crAAAAAElFTkSuQmCC';
 
 // A styled table as the editor authors it: name + look on the table, the style's fill,
 // borders and `region` materialized onto the cells (paintTable). Both importers
diff --git a/tests/lo-roundtrip.test.ts b/tests/lo-roundtrip.test.ts
index 7e14f3a..5abca62 100644
--- a/tests/lo-roundtrip.test.ts
+++ b/tests/lo-roundtrip.test.ts
@@ -23,7 +23,7 @@ function check(label: string, cond: boolean, detail?: unknown) {
 const T = (text: string, ...marks: N[]): N => ({ type: 'text', text, ...(marks.length ? { marks } : {}) });
 const P = (attrs: N | null, ...content: N[]): N => ({ type: 'paragraph', ...(attrs ? { attrs } : {}), ...(content.length ? { content } : {}) });
 const LI = (...content: N[]): N => ({ type: 'listItem', content });
-const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAC0lEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==';
+const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR4nGNwaDgAAAKEAYEml6crAAAAAElFTkSuQmCC';
 const IMGN = (width: number, height: number, alt?: string, rotation?: number, wrap?: string): N =>
   ({ type: 'image', attrs: {
     src: PNG, width, height,
diff --git a/tests/render-parity/make-fixtures.mjs b/tests/render-parity/make-fixtures.mjs
index b6fdd92..4744318 100644
--- a/tests/render-parity/make-fixtures.mjs
+++ b/tests/render-parity/make-fixtures.mjs
@@ -260,7 +260,7 @@ await write('12-notes.docx', [{
 
 // 13. Images: an inline picture in the line, sized in EMU by the lib.
 const PNG = Buffer.from(
-  'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAC0lEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==',
+  'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR4nGNwaDgAAAKEAYEml6crAAAAAElFTkSuQmCC',
   'base64');
 await write('13-images.docx', [{
   properties: { page },
diff --git a/tests/roundtrip.test.ts b/tests/roundtrip.test.ts
index f15b3d3..ae4f499 100644
--- a/tests/roundtrip.test.ts
+++ b/tests/roundtrip.test.ts
@@ -41,7 +41,7 @@ const CELLM = (colspan: number, rowspan: number, colwidth: number[] | null, text
 const ROW = (...cells: N[]): N => ({ type: 'tableRow', content: cells });
 
 // A tiny valid PNG; only its bytes matter for the round-trip (no image decoding).
-const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAC0lEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==';
+const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR4nGNwaDgAAAKEAYEml6crAAAAAElFTkSuQmCC';
 const IMGN = (width: number, height: number, alt?: string, rotation?: number, wrap?: string, wrapOffsetY?: number): N =>
   ({ type: 'image', attrs: {
     src: PNG, width, height,
@@ -1070,7 +1070,7 @@ describe('Leg 3a: different first page header/footer → buildOdt → importOdt'
 
 describe('Leg 3b: inline images in header/footer → buildOdt → importOdt', () => {
   it('round-trips an as-char image in a default zone and a first-page zone', async () => {
-    const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==';
+    const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR4nGNwaDgAAAKEAYEml6crAAAAAElFTkSuQmCC';
     const img = (w: number, h: number): N => ({ type: 'image', attrs: { src: PNG, alt: 'Logo', width: w, height: h, wrap: 'inline' } });
     const footer: N = { type: 'doc', content: [P({ textAlign: 'center' }, T('Logo '), img(120, 48))] };
     const headerFirst: N = { type: 'doc', content: [P(null, img(200, 60))] };
diff --git a/tests/unit/docx-export.test.ts b/tests/unit/docx-export.test.ts
index a6b7156..4f2bf85 100644
--- a/tests/unit/docx-export.test.ts
+++ b/tests/unit/docx-export.test.ts
@@ -5,7 +5,7 @@ import { HEADER_SHADE } from '../../src/lib/editor/extensions/tableHeaderRow';
 
 // 1×1 transparent PNG.
 const PNG =
-  'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYPhfDwAChwGA60e6kgAAAABJRU5ErkJggg==';
+  'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR4nGNwaDgAAAKEAYEml6crAAAAAElFTkSuQmCC';
 
 const text = (t: string, marks?: any[]) => ({ type: 'text', text: t, ...(marks ? { marks } : {}) });
 const para = (content: any, attrs: any = {}) => ({ type: 'paragraph', attrs, content: Array.isArray(content) ? content : [text(content)] });
diff --git a/tests/unit/docx-header-floating-image.test.ts b/tests/unit/docx-header-floating-image.test.ts
index b8b1338..faf10ae 100644
--- a/tests/unit/docx-header-floating-image.test.ts
+++ b/tests/unit/docx-header-floating-image.test.ts
@@ -4,7 +4,7 @@ import { importDocx } from '../../src/lib/import/docx';
 
 // A 1x1 PNG — real bytes so the importer's magic-number sniff accepts the media.
 const PNG = Uint8Array.from(
-  atob('iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYPhfDwAChwGA60e6kgAAAABJRU5ErkJggg=='),
+  atob('iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR4nGNwaDgAAAKEAYEml6crAAAAAElFTkSuQmCC'),
   (c) => c.charCodeAt(0),
 );
 
diff --git a/tests/unit/frame-band.test.ts b/tests/unit/frame-band.test.ts
index 4cd1daf..ade3df5 100644
--- a/tests/unit/frame-band.test.ts
+++ b/tests/unit/frame-band.test.ts
@@ -8,7 +8,7 @@ import { importDocx } from '../../src/lib/import/docx';
 
 type N = any;
 
-const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAC0lEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==';
+const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR4nGNwaDgAAAKEAYEml6crAAAAAElFTkSuQmCC';
 const IMG = (attrs: N): N => ({ type: 'image', attrs: { src: PNG, width: 300, height: 200, ...attrs } });
 const para = (img: N): N => ({ type: 'paragraph', content: [img] });
 const frames = (d: N) => d.content.flatMap((b: N) => (b.content ?? []).filter((n: N) => n.type === 'image'));
diff --git a/tests/unit/frame-offset.test.ts b/tests/unit/frame-offset.test.ts
index 506f36f..691c75d 100644
--- a/tests/unit/frame-offset.test.ts
+++ b/tests/unit/frame-offset.test.ts
@@ -9,7 +9,7 @@ import { importDocx } from '../../src/lib/import/docx';
 
 type N = any;
 
-const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAC0lEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==';
+const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR4nGNwaDgAAAKEAYEml6crAAAAAElFTkSuQmCC';
 const IMG = (attrs: N): N => ({ type: 'image', attrs: { src: PNG, width: 200, height: 120, ...attrs } });
 
 const doc: N = {
diff --git a/tests/unit/inline-valign.test.ts b/tests/unit/inline-valign.test.ts
index 2cd1f64..10939ed 100644
--- a/tests/unit/inline-valign.test.ts
+++ b/tests/unit/inline-valign.test.ts
@@ -7,7 +7,7 @@ import { inlineVerticalAlign } from '../../src/lib/editor/extensions/image';
 
 type N = any;
 
-const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAC0lEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==';
+const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR4nGNwaDgAAAKEAYEml6crAAAAAElFTkSuQmCC';
 const IMG = (attrs: N): N => ({ type: 'image', attrs: { src: PNG, width: 80, height: 40, ...attrs } });
 const margins = { top: 2, bottom: 2, left: 2, right: 2 };
 
diff --git a/tests/unit/note-image.test.ts b/tests/unit/note-image.test.ts
index 1a54e62..dc743ac 100644
--- a/tests/unit/note-image.test.ts
+++ b/tests/unit/note-image.test.ts
@@ -5,7 +5,7 @@ import { unzipSync, strFromU8 } from 'fflate';
 import { buildDocx } from '../../src/lib/export/docx';
 import { importDocx } from '../../src/lib/import/docx';
 
-const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAC0lEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==';
+const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR4nGNwaDgAAAKEAYEml6crAAAAAElFTkSuQmCC';
 const img = { type: 'image', attrs: { src: PNG, width: 40, height: 30 } };
 const doc = (kind: 'footnote' | 'endnote') => ({
   type: 'doc',
diff --git a/tests/unit/wrap-through.test.ts b/tests/unit/wrap-through.test.ts
index 76ceb12..8d57ffb 100644
--- a/tests/unit/wrap-through.test.ts
+++ b/tests/unit/wrap-through.test.ts
@@ -8,7 +8,7 @@ import { importDocx } from '../../src/lib/import/docx';
 
 type N = any;
 
-const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAC0lEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==';
+const PNG = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR4nGNwaDgAAAKEAYEml6crAAAAAElFTkSuQmCC';
 const IMG = (attrs: N): N => ({ type: 'image', attrs: { src: PNG, width: 200, height: 120, ...attrs } });
 
 const docWith = (attrs: N): N => ({