diff --git a/src/throttle/amoc_throttle.erl b/src/throttle/amoc_throttle.erl
index 1070af8c..a4eb8a92 100644
--- a/src/throttle/amoc_throttle.erl
+++ b/src/throttle/amoc_throttle.erl
@@ -6,8 +6,7 @@
 -export([start/2, stop/1,
          send/2, send/3, wait/1,
          run/2, pause/1, resume/1, unlock/1,
-         change_rate/2, change_rate/3,
-         change_rate_gradually/2, change_rate_gradually/6]).
+         change_rate/2, change_rate_gradually/2]).
 
 -type name() :: atom().
 %% Atom representing the name of the throttle.
@@ -87,11 +86,6 @@ unlock(Name) ->
 change_rate(Name, #{rate := Rate, interval := Interval}) ->
     amoc_throttle_controller:change_rate(Name, Rate, Interval).
 
-%% @see change_rate/2
--spec change_rate(name(), rate(), interval()) -> ok | {error, any()}.
-change_rate(Name, Rate, Interval) ->
-    amoc_throttle_controller:change_rate(Name, Rate, Interval).
-
 %% @doc Allows to set a plan of gradual rate changes for a given `Name'.
 %%
 %% `Rate' will be changed from `FromRate' to `ToRate' in a series of consecutive steps.
@@ -107,14 +101,6 @@ change_rate(Name, Rate, Interval) ->
 change_rate_gradually(Name, Config) ->
     amoc_throttle_controller:change_rate_gradually(Name, Config).
 
-%% @see change_rate_gradually/2
--spec change_rate_gradually(name(), rate(), rate(), interval(), pos_integer(), pos_integer()) ->
-    ok | {error, any()}.
-change_rate_gradually(Name, FromRate, ToRate, RateInterval, StepInterval, StepCount) ->
-    Config = #{from_rate => FromRate, to_rate => ToRate, interval => RateInterval,
-               step_interval => StepInterval, step_count => StepCount},
-    amoc_throttle_controller:change_rate_gradually(Name, Config).
-
 %% @doc Executes a given function `Fn' when it does not exceed the rate for `Name'.
 %%
 %% `Fn' is executed in the context of a new process spawned on the same node on which
diff --git a/test/throttle_SUITE.erl b/test/throttle_SUITE.erl
index 6560cfe2..6aa76108 100644
--- a/test/throttle_SUITE.erl
+++ b/test/throttle_SUITE.erl
@@ -27,7 +27,6 @@ groups() ->
        start_and_stop,
        change_rate,
        change_rate_gradually,
-       change_rate_gradually_descriptive,
        change_rate_gradually_verify_descriptions,
        just_wait,
        wait_for_process_to_die_sends_a_kill,
@@ -146,34 +145,33 @@ start_and_stop(_) ->
 
 change_rate(_) ->
     ?assertMatch({error, {no_throttle_by_name, ?FUNCTION_NAME}},
-                 amoc_throttle:change_rate(?FUNCTION_NAME, 100, ?DEFAULT_INTERVAL)),
+                 amoc_throttle:change_rate(?FUNCTION_NAME,
+                                           #{rate => 100, interval => ?DEFAULT_INTERVAL})),
     ?assertMatch({ok, started}, amoc_throttle:start(?FUNCTION_NAME, 100)),
-    ?assertMatch(ok, amoc_throttle:change_rate(?FUNCTION_NAME, 100, ?DEFAULT_INTERVAL)),
-    ?assertMatch(ok, amoc_throttle:change_rate(?FUNCTION_NAME, 100, ?DEFAULT_INTERVAL + 1)),
-    E1 = #{rate => 100, interval => ?DEFAULT_INTERVAL + 2},
-    ?assertMatch(ok, amoc_throttle:change_rate(?FUNCTION_NAME, E1)).
+    E1 = #{rate => 100, interval => ?DEFAULT_INTERVAL},
+    ?assertMatch(ok, amoc_throttle:change_rate(?FUNCTION_NAME, E1)),
+    E2 = #{rate => 100, interval => ?DEFAULT_INTERVAL + 1},
+    ?assertMatch(ok, amoc_throttle:change_rate(?FUNCTION_NAME, E2)),
+    E3 = #{rate => 100, interval => ?DEFAULT_INTERVAL + 2},
+    ?assertMatch(ok, amoc_throttle:change_rate(?FUNCTION_NAME, E3)).
 
 change_rate_gradually(_) ->
+    C1 = #{from_rate => 100, to_rate => 200, interval => 1,
+           step_interval => 1, step_count => 1},
     ?assertMatch({error, {no_throttle_by_name, ?FUNCTION_NAME}},
-                 amoc_throttle:change_rate_gradually(?FUNCTION_NAME, 100, 200, 1, 1, 1)),
+                 amoc_throttle:change_rate_gradually(?FUNCTION_NAME, C1)),
     ?assertMatch({ok, started}, amoc_throttle:start(?FUNCTION_NAME, 100)),
-    ?assertMatch(ok, amoc_throttle:change_rate_gradually(?FUNCTION_NAME, 10, 3000, 1, 100, 300)),
+
+    C2 = #{from_rate => 10, to_rate => 3000, interval => 1,
+           step_interval => 100, step_count => 300},
+    ?assertMatch(ok, amoc_throttle:change_rate_gradually(?FUNCTION_NAME, C2)),
     %% We cannot change rate while a current gradual change is already running.
+    C3 = #{from_rate => 50, to_rate => 200, interval => 1,
+           step_interval => 1, step_count => 1},
     ?assertMatch({error, cannot_change_rate},
-                 amoc_throttle:change_rate_gradually(?FUNCTION_NAME, 50, 200, 1, 1, 1)),
-    ?assertMatch({error, cannot_change_rate},
-                 amoc_throttle:change_rate(?FUNCTION_NAME, 100, ?DEFAULT_INTERVAL + 1)).
-
-change_rate_gradually_descriptive(_) ->
-    ?assertMatch({ok, started}, amoc_throttle:start(?FUNCTION_NAME, 100)),
-    %% Bad description fails to change rate
-    D1 = #{from_rate => 50, to_rate => 200, interval => 1,
-           step_interval => 1, step_count => 1, step_size => 1},
-    ?assertMatch({error, _}, amoc_throttle:change_rate_gradually(?FUNCTION_NAME, D1)),
-    %% Good description changes rate successfully
-    Description = #{from_rate => 10, to_rate => 3000, interval => 1,
-                    step_interval => 100, step_count => 300, step_size => 9},
-    ?assertMatch(ok, amoc_throttle:change_rate_gradually(?FUNCTION_NAME, Description)).
+                 amoc_throttle:change_rate_gradually(?FUNCTION_NAME, C3)),
+    E1 = #{rate => 100, interval => ?DEFAULT_INTERVAL + 1},
+    ?assertMatch({error, cannot_change_rate}, amoc_throttle:change_rate(?FUNCTION_NAME, E1)).
 
 %% Bad description also fails
 change_rate_gradually_verify_descriptions(_) ->