diff --git a/library/math/random.factor b/library/math/random.factor
index 7a142509cb..08c2040582 100644
--- a/library/math/random.factor
+++ b/library/math/random.factor
@@ -49,16 +49,20 @@ IN: math
 
 : init-random ( seed -- )
     #! Initialize the random number generator with a new seed.
-    mt-n zero-array swap
-    HEX: ffffffff bitand 0 pick set-nth
-    mt-n 1- [ 2dup mt-formula 1+ pick pick 1+ swap set-nth ] repeat
-    mt set 0 mti set
-    generate-mt ;
+    global [
+        mt-n zero-array swap
+        HEX: ffffffff bitand 0 pick set-nth
+        mt-n 1- [ 2dup mt-formula 1+ pick pick 1+ swap set-nth ] repeat
+        mt set 0 mti set
+        generate-mt
+    ] bind ;
 
 : (random-int) ( -- rand )
     #! Generate a random integer between 0 and 2^32-1 inclusive.
-    mti get dup mt-n < [ drop generate-mt 0 ] unless
-    mt-nth mt-temper mti inc ;
+    global [
+        mti get dup mt-n < [ drop generate-mt 0 ] unless
+        mt-nth mt-temper mti inc
+    ] bind ;
 
 : random-int ( n -- rand )
     #! Generate a random integer between 0 and n-1 inclusive.
diff --git a/library/test/random.factor b/library/test/random.factor
index f5f2d403be..ed6a8f1f40 100644
--- a/library/test/random.factor
+++ b/library/test/random.factor
@@ -1,14 +1,12 @@
 IN: temporary
-USE: kernel
-USE: lists
-USE: math
-USE: namespaces
-USE: random
-USE: test
-USE: errors
+USING: errors kernel math namespaces sequences test ;
 
 : check-random-int ( max -- )
-    dup random-int 0 rot between?
-    [ "Assertion failed" throw ] unless ;
+    >r random-int 0 r> between? ;
 
-[ ] [ 100 [ 674 check-random-int ] times ] unit-test
+[ t ] [ 100 [ 674 check-random-int ] all? ] unit-test
+
+: make-100-random-ints
+    [ 100 [ 100 random-int , ] times ] { } make ;
+
+[ f ] [ make-100-random-ints make-100-random-ints = ] unit-test