diff --git a/collects/tests/macro-debugger/all-tests.rkt b/collects/tests/macro-debugger/all-tests.rkt
index 9dd0ec8..0d2ece8 100644
--- a/collects/tests/macro-debugger/all-tests.rkt
+++ b/collects/tests/macro-debugger/all-tests.rkt
@@ -1,6 +1,6 @@
 #lang scheme/base
-(require schemeunit
-         schemeunit/gui)
+(require rktunit
+         rktunit/gui)
 (require macro-debugger/model/debug
          "gentest-framework.ss"
          "gentests.ss"
diff --git a/collects/tests/macro-debugger/gentests.rkt b/collects/tests/macro-debugger/gentests.rkt
index 760ba14..bcf9c2f 100644
--- a/collects/tests/macro-debugger/gentests.rkt
+++ b/collects/tests/macro-debugger/gentests.rkt
@@ -1,5 +1,5 @@
 #lang scheme/base
-(require schemeunit)
+(require rktunit)
 (require macro-debugger/model/debug
          macro-debugger/model/stx-util
          "gentest-framework.ss"
diff --git a/collects/tests/macro-debugger/tests/collects.rkt b/collects/tests/macro-debugger/tests/collects.rkt
index 9e1c948..ee70b26 100644
--- a/collects/tests/macro-debugger/tests/collects.rkt
+++ b/collects/tests/macro-debugger/tests/collects.rkt
@@ -1,6 +1,6 @@
 #lang scheme/base
-(require schemeunit
-         schemeunit/gui)
+(require rktunit
+         rktunit/gui)
 (require macro-debugger/model/debug
          scheme/path
          scheme/gui)
diff --git a/collects/tests/macro-debugger/tests/hiding.rkt b/collects/tests/macro-debugger/tests/hiding.rkt
index de6d130..b3f4a54 100644
--- a/collects/tests/macro-debugger/tests/hiding.rkt
+++ b/collects/tests/macro-debugger/tests/hiding.rkt
@@ -1,5 +1,5 @@
 #lang scheme/base
-(require schemeunit)
+(require rktunit)
 (require macro-debugger/model/debug
          "../test-setup.ss")
 (provide specialized-hiding-tests)
diff --git a/collects/tests/macro-debugger/tests/policy.rkt b/collects/tests/macro-debugger/tests/policy.rkt
index 0069e0a..57f6cab 100644
--- a/collects/tests/macro-debugger/tests/policy.rkt
+++ b/collects/tests/macro-debugger/tests/policy.rkt
@@ -1,5 +1,5 @@
 #lang scheme/base
-(require schemeunit)
+(require rktunit)
 (require macro-debugger/model/debug
          "../test-setup.ss")
 (provide policy-tests)
diff --git a/collects/tests/macro-debugger/tests/regression.rkt b/collects/tests/macro-debugger/tests/regression.rkt
index 8c20839..fb0f9d9 100644
--- a/collects/tests/macro-debugger/tests/regression.rkt
+++ b/collects/tests/macro-debugger/tests/regression.rkt
@@ -1,5 +1,5 @@
 #lang scheme/base
-(require schemeunit)
+(require rktunit)
 (require macro-debugger/model/debug
          macro-debugger/model/steps
          "../test-setup.ss")