diff --git a/tests/vault/gear/scheduler-activity-test.cpp b/tests/vault/gear/scheduler-activity-test.cpp
index 24089e019..fa630e456 100644
--- a/tests/vault/gear/scheduler-activity-test.cpp
+++ b/tests/vault/gear/scheduler-activity-test.cpp
@@ -72,7 +72,10 @@ namespace test {
           verifyActivity_Invoke();
           verifyActivity_Notify_activate();
           verifyActivity_Notify_dispatch();
-          verifyActivity_Gate();
+          verifyActivity_Gate_pass();
+          verifyActivity_Gate_dead();
+          verifyActivity_Gate_block();
+          verifyActivity_Gate_opened();
           
           termBuilder();
           
@@ -112,7 +115,6 @@ namespace test {
        *        - invoke the λ-post to dispatch the chain through the queue
        *        - the chain to be executed is given as `next`
        *        - time window for scheduling as data field
-       * @todo WIP 8/23 ✔ define ✔ implement
        */
       void
       verifyActivity_Post()
@@ -129,7 +131,6 @@ namespace test {
           Time tt{11,11};
           post.activate (tt, detector.executionCtx);
           
-          cout << detector.showLog() <<endl;
           CHECK (detector.verifyInvocation("CTX-post").arg("11.011", "Act(POST", "≺test::CTX≻"));
         }
       
@@ -176,6 +177,7 @@ namespace test {
           Time tt{111,11};
           notify.activate (tt, detector.executionCtx);
           cout << detector.showLog() <<endl;
+          CHECK (detector.verifyInvocation("CTX-post").arg("11.111", "Act(NOTIFY", "≺test::CTX≻"));
         }
       
       
@@ -189,22 +191,77 @@ namespace test {
       verifyActivity_Notify_dispatch()
         {
           ActivityDetector detector;
-          
-          Activity notify{detector.buildActivationProbe("targetActivity")};
+                                   // use a diagnostic Tap as chain to detect passing of notification
+          Activity notify{detector.buildActivationProbe("notifyTargetActivity")};
           
           Time tt{111,11};
           notify.dispatch (tt, detector.executionCtx);
           cout << detector.showLog() <<endl;
+          CHECK (detector.verifyInvocation("notifyTargetActivity").arg("11.111"));
+        }
+      
+      
+      
+      /** @test TODO behaviour of Activity::GATE
+       * @todo WIP 8/23 🔁 define ⟶ implement
+       */
+      void
+      verifyActivity_Gate_pass()
+        {
+          Activity chain;
+          Activity gate{0};
+          gate.next = &chain;
+          
+          ActivityDetector detector;
+          cout << detector.showLog() <<endl;
         }
       
       
       
       /** @test TODO behaviour of Activity::GATE
-       * @todo WIP 7/23 ⟶ define ⟶ implement
+       * @todo WIP 8/23 🔁 define ⟶ implement
        */
       void
-      verifyActivity_Gate()
+      verifyActivity_Gate_dead()
         {
+          Activity chain;
+          Activity gate{0};
+          gate.next = &chain;
+          
+          ActivityDetector detector;
+          cout << detector.showLog() <<endl;
+        }
+      
+      
+      
+      /** @test TODO behaviour of Activity::GATE
+       * @todo WIP 8/23 🔁 define ⟶ implement
+       */
+      void
+      verifyActivity_Gate_block()
+        {
+          Activity chain;
+          Activity gate{0};
+          gate.next = &chain;
+          
+          ActivityDetector detector;
+          cout << detector.showLog() <<endl;
+        }
+      
+      
+      
+      /** @test TODO behaviour of Activity::GATE
+       * @todo WIP 8/23 🔁 define ⟶ implement
+       */
+      void
+      verifyActivity_Gate_opened()
+        {
+          Activity chain;
+          Activity gate{0};
+          gate.next = &chain;
+          
+          ActivityDetector detector;
+          cout << detector.showLog() <<endl;
         }
       
       
diff --git a/wiki/thinkPad.ichthyo.mm b/wiki/thinkPad.ichthyo.mm
index 338be4d7b..aa3b8fd6c 100644
--- a/wiki/thinkPad.ichthyo.mm
+++ b/wiki/thinkPad.ichthyo.mm
@@ -79551,16 +79551,28 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 <node COLOR="#338800" CREATED="1689199390484" ID="ID_176395611" MODIFIED="1692369867056" TEXT="verifyActivity_Invoke">
 <icon BUILTIN="button_ok"/>
 </node>
-<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1689199390484" ID="ID_1274424925" MODIFIED="1692718461523" TEXT="verifyActivity_Notify_activate">
-<icon BUILTIN="pencil"/>
+<node COLOR="#338800" CREATED="1689199390484" ID="ID_1274424925" MODIFIED="1692723164509" TEXT="verifyActivity_Notify_activate">
+<icon BUILTIN="button_ok"/>
 </node>
-<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1692718437941" ID="ID_1363192893" MODIFIED="1692718461522" TEXT="verifyActivity_Notify_dispatch">
-<icon BUILTIN="pencil"/>
+<node COLOR="#338800" CREATED="1692718437941" ID="ID_1363192893" MODIFIED="1692723165688" TEXT="verifyActivity_Notify_dispatch">
+<icon BUILTIN="button_ok"/>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1689199390484" ID="ID_212018049" MODIFIED="1692544359039" TEXT="verifyActivity_Gate">
+<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1689199390484" ID="ID_212018049" MODIFIED="1692723170521" TEXT="verifyActivity_Gate">
 <linktarget COLOR="#2c8d69" DESTINATION="ID_212018049" ENDARROW="Default" ENDINCLINATION="556;74;" ID="Arrow_ID_1693904148" SOURCE="ID_1220469732" STARTARROW="None" STARTINCLINATION="472;34;"/>
+<icon BUILTIN="pencil"/>
+<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1692723178576" ID="ID_214653366" MODIFIED="1692723193879" TEXT="pass">
 <icon BUILTIN="flag-yellow"/>
 </node>
+<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1692723181232" ID="ID_1906220001" MODIFIED="1692723193880" TEXT="dead">
+<icon BUILTIN="flag-yellow"/>
+</node>
+<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1692723183479" ID="ID_785522791" MODIFIED="1692723193880" TEXT="block">
+<icon BUILTIN="flag-yellow"/>
+</node>
+<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1692723186655" ID="ID_343855322" MODIFIED="1692723193881" TEXT="opened">
+<icon BUILTIN="flag-yellow"/>
+</node>
+</node>
 <node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1689200547247" ID="ID_1506436785" MODIFIED="1689200552551" TEXT="termBuilder">
 <icon BUILTIN="flag-yellow"/>
 </node>