diff -r a1b920bc870d test/testdraw2.c
--- a/test/testdraw2.c	Tue Jun 16 22:16:35 2015 -0700
+++ b/test/testdraw2.c	Wed Jun 17 09:01:48 2015 +0200
@@ -72,8 +72,8 @@
         SDL_SetRenderDrawColor(renderer, 255, (Uint8) current_color,
                                (Uint8) current_color, (Uint8) current_alpha);
 
-        x = rand() % viewport.w;
-        y = rand() % viewport.h;
+        x = lrand48() % viewport.w;
+        y = lrand48() % viewport.h;
         SDL_RenderDrawPoint(renderer, x, y);
     }
 }
@@ -121,10 +121,10 @@
             SDL_RenderDrawLine(renderer, 0, viewport.h / 2, viewport.w - 1, viewport.h / 2);
             SDL_RenderDrawLine(renderer, viewport.w / 2, 0, viewport.w / 2, viewport.h - 1);
         } else {
-            x1 = (rand() % (viewport.w*2)) - viewport.w;
-            x2 = (rand() % (viewport.w*2)) - viewport.w;
-            y1 = (rand() % (viewport.h*2)) - viewport.h;
-            y2 = (rand() % (viewport.h*2)) - viewport.h;
+            x1 = (lrand48() % (viewport.w*2)) - viewport.w;
+            x2 = (lrand48() % (viewport.w*2)) - viewport.w;
+            y1 = (lrand48() % (viewport.h*2)) - viewport.h;
+            y2 = (lrand48() % (viewport.h*2)) - viewport.h;
             SDL_RenderDrawLine(renderer, x1, y1, x2, y2);
         }
     }
@@ -167,10 +167,10 @@
         SDL_SetRenderDrawColor(renderer, 255, (Uint8) current_color,
                                (Uint8) current_color, (Uint8) current_alpha);
 
-        rect.w = rand() % (viewport.h / 2);
-        rect.h = rand() % (viewport.h / 2);
-        rect.x = (rand() % (viewport.w*2) - viewport.w) - (rect.w / 2);
-        rect.y = (rand() % (viewport.h*2) - viewport.h) - (rect.h / 2);
+        rect.w = lrand48() % (viewport.h / 2);
+        rect.h = lrand48() % (viewport.h / 2);
+        rect.x = (lrand48() % (viewport.w*2) - viewport.w) - (rect.w / 2);
+        rect.y = (lrand48() % (viewport.h*2) - viewport.h) - (rect.h / 2);
         SDL_RenderFillRect(renderer, &rect);
     }
 }
@@ -274,7 +274,7 @@
         SDL_RenderClear(renderer);
     }
 
-    srand((unsigned int)time(NULL));
+    srand48((unsigned int)time(NULL));
 
     /* Main render loop */
     frames = 0;
diff -r a1b920bc870d test/testintersections.c
--- a/test/testintersections.c	Tue Jun 16 22:16:35 2015 -0700
+++ b/test/testintersections.c	Wed Jun 17 09:01:48 2015 +0200
@@ -74,8 +74,8 @@
         SDL_SetRenderDrawColor(renderer, 255, (Uint8) current_color,
                                (Uint8) current_color, (Uint8) current_alpha);
 
-        x = rand() % viewport.w;
-        y = rand() % viewport.h;
+        x = lrand48() % viewport.w;
+        y = lrand48() % viewport.h;
         SDL_RenderDrawPoint(renderer, x, y);
     }
 }
@@ -226,15 +226,15 @@
                 if (event.key.keysym.mod & KMOD_SHIFT)
                     num_lines = 0;
                 else
-                    add_line(rand() % 640, rand() % 480, rand() % 640,
-                             rand() % 480);
+                    add_line(lrand48() % 640, lrand48() % 480, lrand48() % 640,
+                             lrand48() % 480);
                 break;
             case 'r':
                 if (event.key.keysym.mod & KMOD_SHIFT)
                     num_rects = 0;
                 else
-                    add_rect(rand() % 640, rand() % 480, rand() % 640,
-                             rand() % 480);
+                    add_rect(lrand48() % 640, lrand48() % 480, lrand48() % 640,
+                             lrand48() % 480);
                 break;
             }
             break;
@@ -333,7 +333,7 @@
         SDL_RenderClear(renderer);
     }
 
-    srand(time(NULL));
+    srand48(time(NULL));
 
     /* Main render loop */
     frames = 0;
diff -r a1b920bc870d test/testnative.c
--- a/test/testnative.c	Tue Jun 16 22:16:35 2015 -0700
+++ b/test/testnative.c	Wed Jun 17 09:01:48 2015 +0200
@@ -191,7 +191,7 @@
         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Out of memory!\n");
         quit(2);
     }
-    srand(time(NULL));
+    srand48(time(NULL));
     for (i = 0; i < NUM_SPRITES; ++i) {
         positions[i].x = rand() % (window_w - sprite_w);
         positions[i].y = rand() % (window_h - sprite_h);
diff -r a1b920bc870d test/testrelative.c
--- a/test/testrelative.c	Tue Jun 16 22:16:35 2015 -0700
+++ b/test/testrelative.c	Wed Jun 17 09:01:48 2015 +0200
@@ -101,7 +101,7 @@
         SDL_RenderClear(renderer);
     }
 
-    srand((unsigned int)time(NULL));
+    srand48((unsigned int)time(NULL));
     if(SDL_SetRelativeMouseMode(SDL_TRUE) < 0) {
         return 3;
     };
diff -r a1b920bc870d test/testspriteminimal.c
--- a/test/testspriteminimal.c	Tue Jun 16 22:16:35 2015 -0700
+++ b/test/testspriteminimal.c	Wed Jun 17 09:01:48 2015 +0200
@@ -162,17 +162,17 @@
     }
 
     /* Initialize the sprite positions */
-    srand(time(NULL));
+    srand48(time(NULL));
     for (i = 0; i < NUM_SPRITES; ++i) {
-        positions[i].x = rand() % (WINDOW_WIDTH - sprite_w);
-        positions[i].y = rand() % (WINDOW_HEIGHT - sprite_h);
+        positions[i].x = lrand48() % (WINDOW_WIDTH - sprite_w);
+        positions[i].y = lrand48() % (WINDOW_HEIGHT - sprite_h);
         positions[i].w = sprite_w;
         positions[i].h = sprite_h;
         velocities[i].x = 0;
         velocities[i].y = 0;
         while (!velocities[i].x && !velocities[i].y) {
-            velocities[i].x = (rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
-            velocities[i].y = (rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
+            velocities[i].x = (lrand48() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
+            velocities[i].y = (lrand48() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
         }
     }