diff --git a/Tests/LibGfx/TestImageDecoder.cpp b/Tests/LibGfx/TestImageDecoder.cpp
index 7588dadbd1f..423945d5283 100644
--- a/Tests/LibGfx/TestImageDecoder.cpp
+++ b/Tests/LibGfx/TestImageDecoder.cpp
@@ -325,17 +325,6 @@ TEST_CASE(test_jbig2_size)
     EXPECT_EQ(plugin_decoder->size(), Gfx::IntSize(399, 400));
 }
 
-TEST_CASE(test_jbig2_black_47x23)
-{
-    auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("jbig2/black_47x23.jbig2"sv)));
-    EXPECT(Gfx::JBIG2ImageDecoderPlugin::sniff(file->bytes()));
-    auto plugin_decoder = TRY_OR_FAIL(Gfx::JBIG2ImageDecoderPlugin::create(file->bytes()));
-
-    auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 47, 23 }));
-    for (auto pixel : *frame.image)
-        EXPECT_EQ(pixel, Gfx::Color(Gfx::Color::Black).value());
-}
-
 TEST_CASE(test_jbig2_white_47x23)
 {
     auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("jbig2/white_47x23.jbig2"sv)));
diff --git a/Userland/Libraries/LibGfx/ImageFormats/JBIG2Loader.cpp b/Userland/Libraries/LibGfx/ImageFormats/JBIG2Loader.cpp
index d9eb1262451..d76eab5e5f7 100644
--- a/Userland/Libraries/LibGfx/ImageFormats/JBIG2Loader.cpp
+++ b/Userland/Libraries/LibGfx/ImageFormats/JBIG2Loader.cpp
@@ -846,6 +846,11 @@ static ErrorOr<void> decode_immediate_generic_region(JBIG2LoadingContext& contex
         || information_field.y_location + information_field.height > (u32)context.page.size.height()) {
         return Error::from_string_literal("JBIG2ImageDecoderPlugin: Region bounds outsize of page bounds");
     }
+    if (information_field.external_combination_operator() != RegionSegmentInformationField::CombinationOperator::Or
+        && information_field.external_combination_operator() != RegionSegmentInformationField::CombinationOperator::Xor
+        && information_field.external_combination_operator() != RegionSegmentInformationField::CombinationOperator::Replace)
+        return Error::from_string_literal("JBIG2ImageDecoderPlugin: Cannot handle external combination operator other than OR, XOR, and REPLACE yet");
+
     for (size_t y = 0; y < information_field.height; ++y) {
         for (size_t x = 0; x < information_field.width; ++x) {
             // FIXME: Honor segment's combination operator instead of just copying.
@@ -904,6 +909,8 @@ static ErrorOr<void> decode_page_information(JBIG2LoadingContext& context, Segme
     context.page.bits = TRY(BitBuffer::create(page_information.bitmap_width, height));
 
     // "3) Fill the page buffer with the page's default pixel value."
+    if (default_color == 1)
+        return Error::from_string_literal("JBIG2ImageDecoderPlugin: Can only handle white default color for now");
     context.page.bits->fill(default_color != 0);
 
     return {};