diff --git a/doc/test-suite.dox b/doc/test-suite.dox
index 83cae24b..30dd1579 100644
--- a/doc/test-suite.dox
+++ b/doc/test-suite.dox
@@ -25,10 +25,10 @@ resulting `/dev/input/eventX` nodes. Some tests require temporary udev rules.
 
 @section test-filtering Selective running of tests
 
-Check enables tests to be grouped into suites and test cases, litest uses
-test suites as a general feature-specific grouping (e.g. "touchpad:tap") and
-instantiates one test case per device. The --list flag shows the list of
-suites and tests.
+litest's tests are grouped by test groups and devices. A test group is e.g.
+"touchpad:tap" and incorporates all tapping-related tests for touchpads.
+Each test function is (usually) run with one or more specific devices.
+The `--list` commandline argument shows the list of suites and tests.
 @code
 $ ./test/test-device --list
 device:wheel:
@@ -52,16 +52,6 @@ uinput by litest. The "no device" entry signals that litest does not
 instantiate a uinput device for a specific test (though the test itself may
 instantiate one).
 
-Check provides two filters through environment variables: <b>CK_RUN_SUITE</b>
-and <b>CK_RUN_CASE</b>. They may be used independently or combined to narrow
-down the set of tests to run. For example:
-
-@code
-$ CK_RUN_SUITE="device:wheel" ./test/test-device
-$ CK_RUN_CASE="wheel only" ./test/test-device
-$ CK_RUN_SUITE="device:wheel" CK_RUN_CASE="wheel only" ./test/test-device
-@endcode
-
 The `--filter-test` argument enables selective running of tests through
 basic shell-style function name matching. For example: