diff --git a/tests/test-exchange-obsmarkers-case-A7.t b/tests/test-exchange-obsmarkers-case-A7.t
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@@ -0,0 +1,93 @@
+============================================
+Testing obsolescence markers push: Cases A.7
+============================================
+
+Mercurial pushes obsolescences markers relevant to the "pushed-set", the set of
+all changesets that requested to be "in sync" after the push (even if they are
+already on both side).
+
+This test belongs to a series of tests checking such set is properly computed
+and applied. This does not tests "obsmarkers" discovery capabilities.
+
+Category A: simple cases
+TestCase 7: markers one non targeted common changeset
+
+A.7 non targeted common changeset
+=================================
+
+.. {{{
+..    ⇠◕ A
+..     |
+..     ● O
+.. }}}
+..
+.. Markers exist from:
+..
+..  * Chain from A
+..
+.. Command run:
+..
+..  * hg push -r O
+..
+.. Expected exchange:
+..
+..  * ø
+
+Setup
+-----
+
+  $ . $TESTDIR/testlib/exchange-obsmarker-util.sh
+
+Initial
+
+  $ setuprepos A.7
+  creating test repo for test case A.7
+  - pulldest
+  - main
+  - pushdest
+  cd into `main` and proceed with env setup
+  $ cd main
+  $ mkcommit A
+  $ hg push -q ../pushdest
+  $ hg push -q ../pulldest
+  $ hg debugobsolete aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa `getid 'desc(A)'`
+  $ hg log -G --hidden
+  @  f5bc6836db60 (draft): A
+  |
+  o  a9bdc8b26820 (public): O
+  
+  $ inspect_obsmarkers
+  obsstore content
+  ================
+  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa f5bc6836db60e308a17ba08bf050154ba9c4fad7 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
+  $ cd ..
+  $ cd ..
+
+Actual Test
+-----------------------------------
+
+  $ dotest A.7 O
+  ## Running testcase A.7
+  # testing echange of "O" (a9bdc8b26820)
+  ## initial state
+  # obstore: main
+  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa f5bc6836db60e308a17ba08bf050154ba9c4fad7 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
+  # obstore: pushdest
+  # obstore: pulldest
+  ## pushing "O" from main to pushdest
+  pushing to pushdest
+  searching for changes
+  no changes found
+  ## post push state
+  # obstore: main
+  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa f5bc6836db60e308a17ba08bf050154ba9c4fad7 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
+  # obstore: pushdest
+  # obstore: pulldest
+  ## pulling "a9bdc8b26820" from main into pulldest
+  pulling from main
+  no changes found
+  ## post pull state
+  # obstore: main
+  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa f5bc6836db60e308a17ba08bf050154ba9c4fad7 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
+  # obstore: pushdest
+  # obstore: pulldest