[test] Use shared headless display

Prevents some OpenGL implementations from bailing out.

2 files changed, 3 insertions, 3 deletions

diff --git a/test/util/memory.test.cpp b/test/util/memory.test.cpp
index 07927b43eb..bd67e2c26b 100644
--- a/test/util/memory.test.cpp
+++ b/test/util/memory.test.cpp
@@ -56,7 +56,7 @@ public:
     }
 
     util::RunLoop runLoop;
-    HeadlessBackend backend;
+    HeadlessBackend backend { test::sharedDisplay() };
     OffscreenView view{ backend.getContext(), { 512, 512 } };
     StubFileSource fileSource;
     ThreadPool threadPool { 4 };
diff --git a/test/util/offscreen_texture.test.cpp b/test/util/offscreen_texture.test.cpp
index 683a4e6095..9a07f4f3bf 100644
--- a/test/util/offscreen_texture.test.cpp
+++ b/test/util/offscreen_texture.test.cpp
@@ -10,7 +10,7 @@
 using namespace mbgl;
 
 TEST(OffscreenTexture, EmptyRed) {
-    HeadlessBackend backend;
+    HeadlessBackend backend { test::sharedDisplay() };
     OffscreenView view(backend.getContext(), { 512, 256 });
     view.bind();
 
@@ -67,7 +67,7 @@ struct Buffer {
 
 
 TEST(OffscreenTexture, RenderToTexture) {
-    HeadlessBackend backend;
+    HeadlessBackend backend { test::sharedDisplay() };
     auto& context = backend.getContext();
 
     MBGL_CHECK_ERROR(glEnable(GL_BLEND));