diff --git a/.gitea/workflows/make_png.yaml b/.gitea/workflows/make_png.yaml
index 4d68986..93152c3 100644
--- a/.gitea/workflows/make_png.yaml
+++ b/.gitea/workflows/make_png.yaml
@@ -23,9 +23,19 @@ jobs:
         run: cmake -S curr -B curr/build -DGLERMINAL_TEST=ON && cmake --build curr/build
       - name: Build previous
         run: cmake -S prev -B prev/build -DGLERMINAL_TEST=ON && cmake --build prev/build
-      - name: Generate PNG file for curr
+      - name: Generate PNG file for current
         run: cd curr/build/tests && XDG_RUNTIME_DIR=$PWD xvfb-run -a ./test-basic
-      - name: Generate PNG file for prev
+      - name: Generate PNG file for previous
         run: cd prev/build/tests && XDG_RUNTIME_DIR=$PWD xvfb-run -a ./test-basic
+      - name: Upload current PNG
+        uses: actions/upload-artifact@v4
+        with:
+            name: current-basic
+            path: curr/build/tests/image.png
+      - name: Upload previous PNG
+        uses: actions/upload-artifact@v4
+        with:
+            name: previous-basic
+            path: prev/build/tests/image.png
       - name: Compare PNG files
         run: diff curr/build/tests/image.png prev/build/tests/image.png
diff --git a/tests/test-common/test-common.cpp b/tests/test-common/test-common.cpp
index 1a61737..3effeb0 100644
--- a/tests/test-common/test-common.cpp
+++ b/tests/test-common/test-common.cpp
@@ -8,7 +8,7 @@
 
 namespace
 {
-	unsigned char pixels[1280 * 800 * 3];
+	unsigned char pixels[(GRID_WIDTH * CELL_SCALE * 8) * (GRID_HEIGHT * CELL_SCALE * 8) * 3];
 }
 
 void glerminal_test_save_image()
@@ -21,5 +21,5 @@ void glerminal_test_save_image()
 	glGetTexImage(GL_TEXTURE_2D, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels);
 
 	stbi_flip_vertically_on_write(true);
-	stbi_write_png("image.png", GRID_WIDTH * CELL_SCALE * 8, GRID_HEIGHT * CELL_SCALE * 8, 3, pixels, 1280 * 3);
+	stbi_write_png("image.png", GRID_WIDTH * CELL_SCALE * 8, GRID_HEIGHT * CELL_SCALE * 8, 3, pixels, GRID_WIDTH * CELL_SCALE * 8 * 3);
 }
\ No newline at end of file