diff --git a/collects/meta/props b/collects/meta/props
index b11e66e948..8924b31e96 100644
--- a/collects/meta/props
+++ b/collects/meta/props
@@ -636,6 +636,13 @@ path/s is either such a string or a list of them.
 "collects/ffi/examples/tcl.rkt" drdr:command-line "mzc ~s"
 "collects/ffi/examples/xmmsctrl.rkt" drdr:command-line ""
 "collects/ffi/examples/xosd.rkt" drdr:command-line "mzc ~s"
+"collects/ffi/examples/use-c-printf.rkt" drdr:command-line "mzc -k ~s"
+"collects/ffi/examples/use-esd.rkt" drdr:command-line "mzc ~s"
+"collects/ffi/examples/use-magick.rkt" drdr:command-line "mzc ~s"
+"collects/ffi/examples/use-sndfile.rkt" drdr:command-line "mzc ~s"
+"collects/ffi/examples/use-tcl.rkt" drdr:command-line "mzc ~s"
+"collects/ffi/examples/use-xmmsctrl.rkt" drdr:command-line ""
+"collects/ffi/examples/use-xosd.rkt" drdr:command-line "mzc ~s"
 "collects/ffi/magick.rkt" drdr:command-line "mzc ~s"
 "collects/ffi/unsafe/objc.rkt" drdr:command-line "mzc ~s"
 "collects/ffi/private/objc-doc-unsafe.rkt" drdr:command-line "mzc ~s"
diff --git a/collects/tests/mred/auto.rkt b/collects/tests/mred/auto.rkt
index c90f3e5988..8f37aef12c 100644
--- a/collects/tests/mred/auto.rkt
+++ b/collects/tests/mred/auto.rkt
@@ -1,5 +1,5 @@
 
-(load-relative "editor.ss")
-(load-relative "paramz.ss")
-(load-relative "dc.ss")
-(load-relative "windowing.ss")
+(load-relative "editor.rkt")
+(load-relative "paramz.rkt")
+(load-relative "dc.rkt")
+(load-relative "windowing.rkt")
diff --git a/collects/tests/mred/dc.rkt b/collects/tests/mred/dc.rkt
index 217f14e3a1..064603f23e 100644
--- a/collects/tests/mred/dc.rkt
+++ b/collects/tests/mred/dc.rkt
@@ -1,5 +1,5 @@
 
-(load-relative "loadtest.ss")
+(load-relative "loadtest.rkt")
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;                               DC Tests                                     ;;
diff --git a/collects/tests/mred/editor.rkt b/collects/tests/mred/editor.rkt
index 1e235a0d01..e9219151c0 100644
--- a/collects/tests/mred/editor.rkt
+++ b/collects/tests/mred/editor.rkt
@@ -1,5 +1,5 @@
 
-(load-relative "loadtest.ss")
+(load-relative "loadtest.rkt")
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;                            Editor Tests                                    ;;
diff --git a/collects/tests/mred/gui.rkt b/collects/tests/mred/gui.rkt
index 1125a133c5..1cc35d6ee7 100644
--- a/collects/tests/mred/gui.rkt
+++ b/collects/tests/mred/gui.rkt
@@ -1,4 +1,4 @@
-(let ([f (load-relative "gui-main.ss")])
+(let ([f (load-relative "gui-main.rkt")])
   (thread 
    (lambda ()
      (f "New" "Save" mred:console-frame%))))
diff --git a/collects/tests/mred/loadtest.rkt b/collects/tests/mred/loadtest.rkt
index d60140522f..117c1de3ae 100644
--- a/collects/tests/mred/loadtest.rkt
+++ b/collects/tests/mred/loadtest.rkt
@@ -2,4 +2,4 @@
 (unless (with-handlers ([exn:fail? (lambda (x) #f)])
 	  (namespace-variable-binding 'SECTION)
 	  #t)
-  (load-relative "testing.ss"))
+  (load-relative "testing.rkt"))
diff --git a/collects/tests/mred/paramz.rkt b/collects/tests/mred/paramz.rkt
index a74786bfe9..e78265adf4 100644
--- a/collects/tests/mred/paramz.rkt
+++ b/collects/tests/mred/paramz.rkt
@@ -1,5 +1,5 @@
 
-(load-relative "loadtest.ss")
+(load-relative "loadtest.rkt")
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;                             Yield Tests                                    ;;
diff --git a/collects/tests/mred/windowing.rkt b/collects/tests/mred/windowing.rkt
index 6cb61eeb2e..6bda22354c 100644
--- a/collects/tests/mred/windowing.rkt
+++ b/collects/tests/mred/windowing.rkt
@@ -1,5 +1,5 @@
 
-(load-relative "loadtest.ss")
+(load-relative "loadtest.rkt")
 
 (define shorter? #t)
 
diff --git a/collects/tests/racket/benchmarks/mz/parsing.scm b/collects/tests/racket/benchmarks/mz/parsing.scm
index 4900f6f3d2..a1d17b8ecb 100644
--- a/collects/tests/racket/benchmarks/mz/parsing.scm
+++ b/collects/tests/racket/benchmarks/mz/parsing.scm
@@ -1,6 +1,6 @@
 (require (lib "scheme-lexer.ss" "syntax-color") scheme/gui/base)
 
-(define path (build-path (collection-path "framework" "private") "frame.ss"))
+(define path (build-path (collection-path "framework" "private") "frame.rkt"))
 
 (define content 
   (with-input-from-file path
diff --git a/collects/tests/racket/cache-image-snip-test.rkt b/collects/tests/racket/cache-image-snip-test.rkt
index 88606410bf..4dbc72776e 100644
--- a/collects/tests/racket/cache-image-snip-test.rkt
+++ b/collects/tests/racket/cache-image-snip-test.rkt
@@ -1,4 +1,4 @@
-(load-relative "loadtest.ss")
+(load-relative "loadtest.rkt")
 
 (require mrlib/cache-image-snip
          mzlib/unit)
diff --git a/collects/tests/racket/embed-me11.rkt b/collects/tests/racket/embed-me11.rkt
index f3ab6ee9f7..c4771e307e 100644
--- a/collects/tests/racket/embed-me11.rkt
+++ b/collects/tests/racket/embed-me11.rkt
@@ -1,2 +1,2 @@
-#reader(lib "embed-me11-rd.ss" "tests" "mzscheme")
+#reader(lib "embed-me11-rd.ss" "tests" "racket")
 "It goes to ~a!\n"
diff --git a/collects/tests/racket/prompt-sfs.rkt b/collects/tests/racket/prompt-sfs.rkt
index ccc9ede999..cea6d2a9c0 100644
--- a/collects/tests/racket/prompt-sfs.rkt
+++ b/collects/tests/racket/prompt-sfs.rkt
@@ -1,5 +1,5 @@
-#lang scheme
-(require scheme/system)
+#lang racket
+(require racket/system)
 
 #|
 
@@ -10,7 +10,7 @@ the `x' binding is part of the deeper meta-continuation when `ak'
 is captured, but it is delimited inside the binding, so `x'
 should not be reated in `ak'.
 
-The test is implemented using `dump-memory-stats' in another mzscheme
+The test is implemented using `dump-memory-stats' in another racket
 process.
 
 |#
@@ -19,7 +19,7 @@ process.
   (let ([f (find-executable-path (find-system-path 'exec-file) #f)])
     (let ([p (open-output-bytes)])
       (parameterize ([current-error-port p])
-        (system* f "-l" "tests/mzscheme/prompt-sfs" "sub"))
+        (system* f "-l" "tests/racket/prompt-sfs" "sub"))
       (unless (regexp-match? #rx"<will-executor>: +1 +" (get-output-bytes p))
         (error "wrong output")
         (exit 1))))
diff --git a/collects/tests/syntax-color/paren-tree.rkt b/collects/tests/syntax-color/paren-tree.rkt
index 44befb9041..4d7c62d1f9 100644
--- a/collects/tests/syntax-color/paren-tree.rkt
+++ b/collects/tests/syntax-color/paren-tree.rkt
@@ -1,4 +1,4 @@
-(load-relative "../mzscheme/loadtest.ss")
+(load-relative "../racket/loadtest.rkt")
 (require mzlib/class
          syntax-color/paren-tree)
 
diff --git a/collects/tests/syntax-color/token-tree.rkt b/collects/tests/syntax-color/token-tree.rkt
index 1f76b8bd0f..76ba9059b2 100644
--- a/collects/tests/syntax-color/token-tree.rkt
+++ b/collects/tests/syntax-color/token-tree.rkt
@@ -1,4 +1,4 @@
-(load-relative "../mzscheme/loadtest.ss")
+(load-relative "../racket/loadtest.rkt")
 (require mzlib/class
          syntax-color/token-tree)