+test_begin_subtest "notmuch reply should show cleartext if session key is present"
+output=$(notmuch reply id:simple-encrypted@crypto.notmuchmail.org | grep '^>')
+expected='> This is a top sekrit message.'
+if [ $NOTMUCH_HAVE_GMIME_SESSION_KEYS -eq 0 ]; then
+ test_subtest_known_broken
+fi
+test_expect_equal \
+ "$output" \
+ "$expected"
+
+test_begin_subtest "notmuch show should show cleartext if session key is present"
+output=$(notmuch show id:simple-encrypted@crypto.notmuchmail.org | notmuch_show_part 3)
+expected='This is a top sekrit message.'
+if [ $NOTMUCH_HAVE_GMIME_SESSION_KEYS -eq 0 ]; then
+ test_subtest_known_broken
+fi
+test_expect_equal \
+ "$output" \
+ "$expected"
+
+test_begin_subtest "notmuch show should show nothing if decryption is explicitly disallowed"
+output=$(notmuch show --decrypt=false id:simple-encrypted@crypto.notmuchmail.org | notmuch_show_part 3)
+expected='Non-text part: application/octet-stream'
+test_expect_equal \
+ "$output" \
+ "$expected"
+
+test_begin_subtest "purging stashed session keys should lose access to the cleartext"
+notmuch reindex --decrypt=false id:simple-encrypted@crypto.notmuchmail.org
+output=$(notmuch search sekrit)
+expected=''
+test_expect_equal \
+ "$output" \
+ "$expected"
+
+test_begin_subtest "and cleartext should be unrecoverable now that there are no stashed session keys"
+notmuch dump
+notmuch reindex --decrypt=true id:simple-encrypted@crypto.notmuchmail.org
+output=$(notmuch search sekrit)
+expected=''
+test_expect_equal \
+ "$output" \
+ "$expected"
+