diff --git a/collects/schemeunit/gui.ss b/collects/schemeunit/gui.rkt similarity index 100% rename from collects/schemeunit/gui.ss rename to collects/schemeunit/gui.rkt diff --git a/collects/schemeunit/private/base.ss b/collects/schemeunit/private/base.rkt similarity index 100% rename from collects/schemeunit/private/base.ss rename to collects/schemeunit/private/base.rkt diff --git a/collects/schemeunit/private/check-info.ss b/collects/schemeunit/private/check-info.rkt similarity index 100% rename from collects/schemeunit/private/check-info.ss rename to collects/schemeunit/private/check-info.rkt diff --git a/collects/schemeunit/private/check.ss b/collects/schemeunit/private/check.rkt similarity index 100% rename from collects/schemeunit/private/check.ss rename to collects/schemeunit/private/check.rkt diff --git a/collects/schemeunit/private/counter.ss b/collects/schemeunit/private/counter.rkt similarity index 100% rename from collects/schemeunit/private/counter.ss rename to collects/schemeunit/private/counter.rkt diff --git a/collects/schemeunit/private/format.ss b/collects/schemeunit/private/format.rkt similarity index 100% rename from collects/schemeunit/private/format.ss rename to collects/schemeunit/private/format.rkt diff --git a/collects/schemeunit/private/gui/cache-box.ss b/collects/schemeunit/private/gui/cache-box.rkt similarity index 100% rename from collects/schemeunit/private/gui/cache-box.ss rename to collects/schemeunit/private/gui/cache-box.rkt diff --git a/collects/schemeunit/private/gui/config.ss b/collects/schemeunit/private/gui/config.rkt similarity index 100% rename from collects/schemeunit/private/gui/config.ss rename to collects/schemeunit/private/gui/config.rkt diff --git a/collects/schemeunit/private/gui/controller.ss b/collects/schemeunit/private/gui/controller.rkt similarity index 100% rename from collects/schemeunit/private/gui/controller.ss rename to collects/schemeunit/private/gui/controller.rkt diff --git a/collects/schemeunit/private/gui/drscheme-link.ss b/collects/schemeunit/private/gui/drscheme-link.rkt similarity index 100% rename from collects/schemeunit/private/gui/drscheme-link.ss rename to collects/schemeunit/private/gui/drscheme-link.rkt diff --git a/collects/schemeunit/private/gui/drscheme-ui.ss b/collects/schemeunit/private/gui/drscheme-ui.rkt similarity index 100% rename from collects/schemeunit/private/gui/drscheme-ui.ss rename to collects/schemeunit/private/gui/drscheme-ui.rkt diff --git a/collects/schemeunit/private/gui/gui.ss b/collects/schemeunit/private/gui/gui.rkt similarity index 100% rename from collects/schemeunit/private/gui/gui.ss rename to collects/schemeunit/private/gui/gui.rkt diff --git a/collects/schemeunit/private/gui/interfaces.ss b/collects/schemeunit/private/gui/interfaces.rkt similarity index 100% rename from collects/schemeunit/private/gui/interfaces.ss rename to collects/schemeunit/private/gui/interfaces.rkt diff --git a/collects/schemeunit/private/gui/model.ss b/collects/schemeunit/private/gui/model.rkt similarity index 100% rename from collects/schemeunit/private/gui/model.ss rename to collects/schemeunit/private/gui/model.rkt diff --git a/collects/schemeunit/private/gui/model2rml.ss b/collects/schemeunit/private/gui/model2rml.rkt similarity index 100% rename from collects/schemeunit/private/gui/model2rml.ss rename to collects/schemeunit/private/gui/model2rml.rkt diff --git a/collects/schemeunit/private/gui/rml.ss b/collects/schemeunit/private/gui/rml.rkt similarity index 100% rename from collects/schemeunit/private/gui/rml.ss rename to collects/schemeunit/private/gui/rml.rkt diff --git a/collects/schemeunit/private/gui/view.ss b/collects/schemeunit/private/gui/view.rkt similarity index 100% rename from collects/schemeunit/private/gui/view.ss rename to collects/schemeunit/private/gui/view.rkt diff --git a/collects/schemeunit/private/hash-monad.ss b/collects/schemeunit/private/hash-monad.rkt similarity index 100% rename from collects/schemeunit/private/hash-monad.ss rename to collects/schemeunit/private/hash-monad.rkt diff --git a/collects/schemeunit/private/location.ss b/collects/schemeunit/private/location.rkt similarity index 100% rename from collects/schemeunit/private/location.ss rename to collects/schemeunit/private/location.rkt diff --git a/collects/schemeunit/private/monad.ss b/collects/schemeunit/private/monad.rkt similarity index 100% rename from collects/schemeunit/private/monad.ss rename to collects/schemeunit/private/monad.rkt diff --git a/collects/schemeunit/private/name-collector.ss b/collects/schemeunit/private/name-collector.rkt similarity index 100% rename from collects/schemeunit/private/name-collector.ss rename to collects/schemeunit/private/name-collector.rkt diff --git a/collects/schemeunit/private/result.ss b/collects/schemeunit/private/result.rkt similarity index 100% rename from collects/schemeunit/private/result.ss rename to collects/schemeunit/private/result.rkt diff --git a/collects/schemeunit/private/test-case.ss b/collects/schemeunit/private/test-case.rkt similarity index 100% rename from collects/schemeunit/private/test-case.ss rename to collects/schemeunit/private/test-case.rkt diff --git a/collects/schemeunit/private/test-suite.ss b/collects/schemeunit/private/test-suite.rkt similarity index 100% rename from collects/schemeunit/private/test-suite.ss rename to collects/schemeunit/private/test-suite.rkt diff --git a/collects/schemeunit/private/test.ss b/collects/schemeunit/private/test.rkt similarity index 100% rename from collects/schemeunit/private/test.ss rename to collects/schemeunit/private/test.rkt diff --git a/collects/schemeunit/private/text-ui-util.ss b/collects/schemeunit/private/text-ui-util.rkt similarity index 100% rename from collects/schemeunit/private/text-ui-util.ss rename to collects/schemeunit/private/text-ui-util.rkt diff --git a/collects/schemeunit/private/util.ss b/collects/schemeunit/private/util.rkt similarity index 100% rename from collects/schemeunit/private/util.ss rename to collects/schemeunit/private/util.rkt diff --git a/collects/schemeunit/scribblings/base.ss b/collects/schemeunit/scribblings/base.rkt similarity index 100% rename from collects/schemeunit/scribblings/base.ss rename to collects/schemeunit/scribblings/base.rkt diff --git a/collects/schemeunit/text-ui.ss b/collects/schemeunit/text-ui.rkt similarity index 100% rename from collects/schemeunit/text-ui.ss rename to collects/schemeunit/text-ui.rkt diff --git a/collects/schemeunit/tool.ss b/collects/schemeunit/tool.rkt similarity index 100% rename from collects/schemeunit/tool.ss rename to collects/schemeunit/tool.rkt diff --git a/collects/tests/schemeunit/all-schemeunit-tests.ss b/collects/tests/schemeunit/all-schemeunit-tests.rkt similarity index 100% rename from collects/tests/schemeunit/all-schemeunit-tests.ss rename to collects/tests/schemeunit/all-schemeunit-tests.rkt diff --git a/collects/tests/schemeunit/base-test.ss b/collects/tests/schemeunit/base-test.rkt similarity index 100% rename from collects/tests/schemeunit/base-test.ss rename to collects/tests/schemeunit/base-test.rkt diff --git a/collects/tests/schemeunit/check-info-test.ss b/collects/tests/schemeunit/check-info-test.rkt similarity index 100% rename from collects/tests/schemeunit/check-info-test.ss rename to collects/tests/schemeunit/check-info-test.rkt diff --git a/collects/tests/schemeunit/check-test.ss b/collects/tests/schemeunit/check-test.rkt similarity index 100% rename from collects/tests/schemeunit/check-test.ss rename to collects/tests/schemeunit/check-test.rkt diff --git a/collects/tests/schemeunit/counter-test.ss b/collects/tests/schemeunit/counter-test.rkt similarity index 100% rename from collects/tests/schemeunit/counter-test.ss rename to collects/tests/schemeunit/counter-test.rkt diff --git a/collects/tests/schemeunit/format-test.ss b/collects/tests/schemeunit/format-test.rkt similarity index 100% rename from collects/tests/schemeunit/format-test.ss rename to collects/tests/schemeunit/format-test.rkt diff --git a/collects/tests/schemeunit/hash-monad-test.ss b/collects/tests/schemeunit/hash-monad-test.rkt similarity index 100% rename from collects/tests/schemeunit/hash-monad-test.ss rename to collects/tests/schemeunit/hash-monad-test.rkt diff --git a/collects/tests/schemeunit/location-test.ss b/collects/tests/schemeunit/location-test.rkt similarity index 100% rename from collects/tests/schemeunit/location-test.ss rename to collects/tests/schemeunit/location-test.rkt diff --git a/collects/tests/schemeunit/monad-test.ss b/collects/tests/schemeunit/monad-test.rkt similarity index 100% rename from collects/tests/schemeunit/monad-test.ss rename to collects/tests/schemeunit/monad-test.rkt diff --git a/collects/tests/schemeunit/result-test.ss b/collects/tests/schemeunit/result-test.rkt similarity index 100% rename from collects/tests/schemeunit/result-test.ss rename to collects/tests/schemeunit/result-test.rkt diff --git a/collects/tests/schemeunit/run-tests.ss b/collects/tests/schemeunit/run-tests.rkt similarity index 100% rename from collects/tests/schemeunit/run-tests.ss rename to collects/tests/schemeunit/run-tests.rkt diff --git a/collects/tests/schemeunit/standalone-check-test.ss b/collects/tests/schemeunit/standalone-check-test.rkt similarity index 100% rename from collects/tests/schemeunit/standalone-check-test.ss rename to collects/tests/schemeunit/standalone-check-test.rkt diff --git a/collects/tests/schemeunit/standalone-test-case-test.ss b/collects/tests/schemeunit/standalone-test-case-test.rkt similarity index 100% rename from collects/tests/schemeunit/standalone-test-case-test.ss rename to collects/tests/schemeunit/standalone-test-case-test.rkt diff --git a/collects/tests/schemeunit/test-case-test.ss b/collects/tests/schemeunit/test-case-test.rkt similarity index 100% rename from collects/tests/schemeunit/test-case-test.ss rename to collects/tests/schemeunit/test-case-test.rkt diff --git a/collects/tests/schemeunit/test-suite-test.ss b/collects/tests/schemeunit/test-suite-test.rkt similarity index 100% rename from collects/tests/schemeunit/test-suite-test.ss rename to collects/tests/schemeunit/test-suite-test.rkt diff --git a/collects/tests/schemeunit/test-test.ss b/collects/tests/schemeunit/test-test.rkt similarity index 100% rename from collects/tests/schemeunit/test-test.ss rename to collects/tests/schemeunit/test-test.rkt diff --git a/collects/tests/schemeunit/text-ui-test.ss b/collects/tests/schemeunit/text-ui-test.rkt similarity index 100% rename from collects/tests/schemeunit/text-ui-test.ss rename to collects/tests/schemeunit/text-ui-test.rkt diff --git a/collects/tests/schemeunit/text-ui-util-test.ss b/collects/tests/schemeunit/text-ui-util-test.rkt similarity index 100% rename from collects/tests/schemeunit/text-ui-util-test.ss rename to collects/tests/schemeunit/text-ui-util-test.rkt diff --git a/collects/tests/schemeunit/util-test.ss b/collects/tests/schemeunit/util-test.rkt similarity index 100% rename from collects/tests/schemeunit/util-test.ss rename to collects/tests/schemeunit/util-test.rkt