diff --git a/.appveyor.yml b/.appveyor.yml
index c1de90ea..a58eb6dd 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -1,4 +1,8 @@
 version: "{build}"
+environment:
+  global:
+    - E2D_WITHOUT_AUDIO=true
+    - E2D_WITHOUT_GRAPHICS=true
 image:
   - Visual Studio 2017
   - Visual Studio 2019 Preview
diff --git a/.travis.yml b/.travis.yml
index 1c5f531e..a76dd9e1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,8 @@
 language: cpp
+env:
+  global:
+    - E2D_WITHOUT_AUDIO=true
+    - E2D_WITHOUT_GRAPHICS=true
 matrix:
   include:
     - os: linux
diff --git a/sources/enduro2d/core/engine.cpp b/sources/enduro2d/core/engine.cpp
index c4a9fe95..9b18035e 100644
--- a/sources/enduro2d/core/engine.cpp
+++ b/sources/enduro2d/core/engine.cpp
@@ -406,7 +406,11 @@ namespace e2d
 
         // setup audio
 
-        if ( !params.without_audio() ) {
+        const bool without_audio =
+            params.without_audio() ||
+            !!std::getenv("E2D_WITHOUT_AUDIO");
+
+        if ( !without_audio ) {
             safe_module_initialize<audio>(
                 the<debug>());
         }
@@ -419,7 +423,11 @@ namespace e2d
 
         // setup graphics
 
-        if ( !params.without_graphics() )
+        const bool without_graphics =
+            params.without_graphics() ||
+            !!std::getenv("E2D_WITHOUT_GRAPHICS");
+
+        if ( !without_graphics )
         {
             // setup window
 
diff --git a/untests/sources/untests_core/render.cpp b/untests/sources/untests_core/render.cpp
index bcf3a3c3..317024ae 100644
--- a/untests/sources/untests_core/render.cpp
+++ b/untests/sources/untests_core/render.cpp
@@ -13,9 +13,7 @@ namespace
     public:
         safe_engine_initializer() {
             modules::initialize<engine>(0, nullptr,
-                    engine::parameters("renderer_untests", "enduro2d")
-                        .without_audio(true)
-                        .without_graphics(true));
+                engine::parameters("renderer_untests", "enduro2d"));
         }
 
         ~safe_engine_initializer() noexcept {
@@ -26,7 +24,6 @@ namespace
 
 TEST_CASE("render"){
     safe_engine_initializer initializer;
-
     SECTION("sampler_state"){
         {
             const auto ss = render::sampler_state();
@@ -260,8 +257,7 @@ TEST_CASE("render"){
                     bad_render_operation);
             }
 
-            //if ( r.device_capabilities().dxt5_compression_supported ) // TODO: wait for android branch
-            {
+            if ( r.device_capabilities().dxt_compression_supported ) {
                 str resources;
                 REQUIRE(filesystem::extract_predef_path(
                     resources,
diff --git a/untests/sources/untests_high/asset.cpp b/untests/sources/untests_high/asset.cpp
index ecf69fa9..096f4d5a 100644
--- a/untests/sources/untests_high/asset.cpp
+++ b/untests/sources/untests_high/asset.cpp
@@ -14,9 +14,7 @@ namespace
         safe_starter_initializer() {
             modules::initialize<starter>(0, nullptr,
                 starter::parameters(
-                    engine::parameters("asset_untests", "enduro2d")
-                        .without_audio(true)
-                        .without_graphics(true)));
+                    engine::parameters("asset_untests", "enduro2d")));
         }
 
         ~safe_starter_initializer() noexcept {
diff --git a/untests/sources/untests_high/library.cpp b/untests/sources/untests_high/library.cpp
index 316eba4d..8fcff166 100644
--- a/untests/sources/untests_high/library.cpp
+++ b/untests/sources/untests_high/library.cpp
@@ -14,9 +14,7 @@ namespace
         safe_starter_initializer() {
             modules::initialize<starter>(0, nullptr,
                 starter::parameters(
-                    engine::parameters("library_untests", "enduro2d")
-                        .without_audio(true)
-                        .without_graphics(true)));
+                    engine::parameters("library_untests", "enduro2d")));
         }
 
         ~safe_starter_initializer() noexcept {
diff --git a/untests/sources/untests_high/node.cpp b/untests/sources/untests_high/node.cpp
index 273a6236..ef84c48d 100644
--- a/untests/sources/untests_high/node.cpp
+++ b/untests/sources/untests_high/node.cpp
@@ -14,9 +14,7 @@ namespace
         safe_starter_initializer() {
             modules::initialize<starter>(0, nullptr,
                 starter::parameters(
-                    engine::parameters("world_untests", "enduro2d")
-                        .without_audio(true)
-                        .without_graphics(true)));
+                    engine::parameters("world_untests", "enduro2d")));
         }
 
         ~safe_starter_initializer() noexcept {
diff --git a/untests/sources/untests_high/starter.cpp b/untests/sources/untests_high/starter.cpp
index 9020ce97..240d29ba 100644
--- a/untests/sources/untests_high/starter.cpp
+++ b/untests/sources/untests_high/starter.cpp
@@ -10,8 +10,6 @@ using namespace e2d;
 TEST_CASE("starter"){
     modules::initialize<starter>(0, nullptr,
         starter::parameters(
-            engine::parameters("starter_untests", "enduro2d")
-                .without_audio(true)
-                .without_graphics(true)));
+            engine::parameters("starter_untests", "enduro2d")));
     modules::shutdown<starter>();
 }
diff --git a/untests/sources/untests_high/world.cpp b/untests/sources/untests_high/world.cpp
index c5a5cecb..0d5fddb0 100644
--- a/untests/sources/untests_high/world.cpp
+++ b/untests/sources/untests_high/world.cpp
@@ -14,9 +14,7 @@ namespace
         safe_starter_initializer() {
             modules::initialize<starter>(0, nullptr,
                 starter::parameters(
-                    engine::parameters("world_untests", "enduro2d")
-                        .without_audio(true)
-                        .without_graphics(true)));
+                    engine::parameters("world_untests", "enduro2d")));
         }
 
         ~safe_starter_initializer() noexcept {