diff --git a/coresdk/src/test/test_animation.cpp b/coresdk/src/test/test_animation.cpp
index 31c4f620..6c695960 100644
--- a/coresdk/src/test/test_animation.cpp
+++ b/coresdk/src/test/test_animation.cpp
@@ -23,11 +23,11 @@ void run_animation_test()
 {
     vector<string> sequence = { "Walkfront", "WalkLeft", "WalkRight", "WALKBACK", "dance" };
     
-    cout << "Script should not be loaded: " << has_animation_script("kermit");
+    cout << "Script should not be loaded: " << has_animation_script("kermit") << endl;
     
     animation_script kermit = load_animation_script("kermit", "kermit.txt");
     
-    cout << "Script should be loaded: " << has_animation_script("kermit");
+    cout << "Script should be loaded: " << has_animation_script("kermit") << endl;
     
     animation anim = create_animation(kermit, "MoonWalkBack");
     
@@ -57,7 +57,7 @@ void run_animation_test()
             it++;
         }
         
-        refresh_screen();
+        refresh_screen(60);
         
         if (quit_requested() ) break;
     }
diff --git a/coresdk/src/test/test_audio.cpp b/coresdk/src/test/test_audio.cpp
index a45b2265..c62478fa 100644
--- a/coresdk/src/test/test_audio.cpp
+++ b/coresdk/src/test/test_audio.cpp
@@ -42,13 +42,16 @@ void run_audio_tests()
     
     cout << "    Downloading sound effect..." << endl;
     download_sound_effect("text message 2", "http://soundbible.com/grab.php?id=2155&type=wav", 80);
+    cout << "    Playing downloaded sound effect..." << endl;
     play_sound_effect("text message 2", 2, 0.8);
     delay(5000);
     
     cout << "    Downloading music..." << endl;
-    download_music("music", "http://www.royaltyfreemusic.com/music_clips/free/Heartland_1.mp3", 80);
+    download_music("music", "http://assets.mixkit.co/music/493/493.mp3", 80);
+    cout << "    Playing downloaded music..." << endl;
     play_music("music");
     delay(5000);
+    stop_music();
     
     play_sound_effect(s1, 1, 1.0f);
     
diff --git a/coresdk/src/test/test_camera.cpp b/coresdk/src/test/test_camera.cpp
index b788081a..1514bf20 100644
--- a/coresdk/src/test/test_camera.cpp
+++ b/coresdk/src/test/test_camera.cpp
@@ -26,17 +26,18 @@ void run_camera_test()
     sprite_set_anchor_point(s, bitmap_cell_center(sprite_layer(s, 0)));
 
     bool follow = true;
+    const int speed = 10;
 
     while ( ! window_close_requested(w1) )
     {
         process_events();
 
-        if ( key_down( LEFT_KEY) ) sprite_set_dx(s, -1);
-        else if ( key_down( RIGHT_KEY) ) sprite_set_dx(s, 1);
+        if ( key_down( LEFT_KEY) ) sprite_set_dx(s, -speed);
+        else if ( key_down( RIGHT_KEY) ) sprite_set_dx(s, speed);
         else sprite_set_dx(s, 0);
 
-        if ( key_down( UP_KEY) ) sprite_set_dy(s, -1);
-        else if ( key_down( DOWN_KEY) ) sprite_set_dy(s, 1);
+        if ( key_down( UP_KEY) ) sprite_set_dy(s, -speed);
+        else if ( key_down( DOWN_KEY) ) sprite_set_dy(s, speed);
         else sprite_set_dy(s, 0);
 
         if ( key_typed(F_KEY) )
@@ -66,7 +67,7 @@ void run_camera_test()
         draw_triangle(COLOR_AQUA, screen_width() / 2, 0, 0, screen_height(), screen_width(), screen_height());
 
         draw_sprite(s);
-        refresh_screen();
+        refresh_screen(30);
     }
 
     close_window(w1);
diff --git a/coresdk/src/test/test_geometry.cpp b/coresdk/src/test/test_geometry.cpp
index 2ae362dc..25e812fb 100644
--- a/coresdk/src/test/test_geometry.cpp
+++ b/coresdk/src/test/test_geometry.cpp
@@ -13,6 +13,7 @@ using namespace std;
 #include "window_manager.h"
 #include "graphics.h"
 #include "input.h"
+#include "timers.h"
 
 using namespace splashkit_lib;
 
@@ -470,6 +471,7 @@ void test_bitmap_ray_collision()
     point_2d bmp_3_center = point_offset_by(bmp_3_position, vector_to(bitmap_center(bmp_3)));
     point_2d ray_origin = point_at(100, 100);
     vector_2d ray_heading = vector_to(200, 200);
+    const double RAY_STEP = 5.0;
     
     while ( !window_close_requested(w1) ) {
         process_events();
@@ -477,13 +479,13 @@ void test_bitmap_ray_collision()
         clear_screen(COLOR_WHITE);
 
         if (key_down(UP_KEY))
-            ray_origin.y -= 1.0;
+            ray_origin.y -= RAY_STEP;
         if (key_down(DOWN_KEY))
-            ray_origin.y += 1.0;
+            ray_origin.y += RAY_STEP;
         if (key_down(LEFT_KEY))
-            ray_origin.x -= 1.0;
+            ray_origin.x -= RAY_STEP;
         if (key_down(RIGHT_KEY))
-            ray_origin.x += 1.0;
+            ray_origin.x += RAY_STEP;
         
         bool collision_1 = bitmap_ray_collision(bmp_1, 0, bmp_1_position, ray_origin, ray_heading);
         bool collision_2 = bitmap_ray_collision(bmp_2, 0, bmp_2_position, ray_origin, ray_heading);
@@ -517,7 +519,7 @@ void test_bitmap_ray_collision()
         circle ray_origin_circle = circle_at(ray_origin, 3.0);
         draw_circle(COLOR_BLUE, ray_origin_circle);
 
-        refresh_screen();
+        refresh_screen(30);
     }
     close_window(w1);
 }
diff --git a/coresdk/src/test/test_sprites.cpp b/coresdk/src/test/test_sprites.cpp
index 71162589..9fa0a927 100644
--- a/coresdk/src/test/test_sprites.cpp
+++ b/coresdk/src/test/test_sprites.cpp
@@ -991,6 +991,7 @@ void test_sprite_ray_collision()
     sprite_set_rotation(s3, 10.0f);
     point_2d ray_origin = point_at(100, 100);
     vector_2d ray_heading = vector_to(200, 200);
+    const double RAY_STEP = 5.0;
     
     while ( !window_close_requested(w1) ) {
         process_events();
@@ -998,13 +999,13 @@ void test_sprite_ray_collision()
         clear_screen(COLOR_WHITE);
 
         if (key_down(UP_KEY))
-            ray_origin.y -= 1.0;
+            ray_origin.y -= RAY_STEP;
         if (key_down(DOWN_KEY))
-            ray_origin.y += 1.0;
+            ray_origin.y += RAY_STEP;
         if (key_down(LEFT_KEY))
-            ray_origin.x -= 1.0;
+            ray_origin.x -= RAY_STEP;
         if (key_down(RIGHT_KEY))
-            ray_origin.x += 1.0;
+            ray_origin.x += RAY_STEP;
         
         bool collision_1 = sprite_ray_collision(s1, ray_origin, ray_heading);
         bool collision_2 = sprite_ray_collision(s2, ray_origin, ray_heading);
@@ -1038,7 +1039,7 @@ void test_sprite_ray_collision()
         circle ray_origin_circle = circle_at(ray_origin, 3.0);
         draw_circle(COLOR_BLUE, ray_origin_circle);
         
-        refresh_screen();
+        refresh_screen(30);
     }
     close_window(w1);
 }
diff --git a/coresdk/src/test/test_tcp_networking.cpp b/coresdk/src/test/test_tcp_networking.cpp
index c89089b3..b6601e38 100644
--- a/coresdk/src/test/test_tcp_networking.cpp
+++ b/coresdk/src/test/test_tcp_networking.cpp
@@ -129,7 +129,7 @@ void run_tcp_networking_test()
     pause_test();
 
     cout << "Client still:  " << lConA << endl;
-    cout << "Test message send (to closed client):  " << send_message_to(string("A", 876), lConB);
+    cout << "Test message send (to closed client):  " << send_message_to(string("A", 876), lConB) << endl;
 
     pause_test();
     cout << "Test message send (expect false):  " << send_message_to(string("A", 876), lConB) << endl;
diff --git a/coresdk/src/test/test_text.cpp b/coresdk/src/test/test_text.cpp
index d2ec4c31..72f486d6 100644
--- a/coresdk/src/test/test_text.cpp
+++ b/coresdk/src/test/test_text.cpp
@@ -145,7 +145,7 @@ void run_text_test()
     load_font("kochi", "kochi-gothic-subst.ttf");
     draw_text("スプラッシュ・キット", COLOR_BLACK, "kochi", 30, 0, 280);
 
-    download_font("brawler", "https://github.com/google/fonts/raw/master/ofl/brawler/Brawler-Regular.ttf", 443);
+    download_font("brawler", "https://raw.githubusercontent.com/google/fonts/main/ofl/brawler/Brawler-Regular.ttf", 443);
     draw_text("Hello World: Brawler!", COLOR_BLACK, "brawler", 30, 0, 350);
     
     refresh_screen();
diff --git a/coresdk/src/test/test_ui.cpp b/coresdk/src/test/test_ui.cpp
index ea1caf85..3a6b9a08 100644
--- a/coresdk/src/test/test_ui.cpp
+++ b/coresdk/src/test/test_ui.cpp
@@ -20,8 +20,7 @@ using namespace splashkit_lib;
 void run_ui_test()
 {
     open_window("Test UI", 600, 600);
-
-    font fontA = load_font("interface font 1", "arial.ttf");
+    font fontA = load_font("interface font 1", "hara.ttf");
     font fontB = load_font("interface font 2", "kochi-gothic-subst.ttf");
     set_interface_font(fontA);
     set_interface_font_size(12);