diff --git a/testing/tests/carddav/2042-REPORT-addressbook-query.result b/testing/tests/carddav/2042-REPORT-addressbook-query.result
index 99ca96c6..28dabef6 100644
--- a/testing/tests/carddav/2042-REPORT-addressbook-query.result
+++ b/testing/tests/carddav/2042-REPORT-addressbook-query.result
@@ -1,179 +1,2 @@
 <?xml version="1.0" encoding="utf-8" ?>
-<multistatus xmlns="DAV:" xmlns:VC="urn:ietf:params:xml:ns:carddav">
- <response>
-  <href>/caldav.php/user1/addressbook/andrew_mcmillan.vcf</href>
-  <propstat>
-   <prop>
-    <getetag>some valid etag</getetag>
-    <VC:address-data>BEGIN:VCARD
-VERSION:3.0
-TEL;X-EVOLUTION-UI-SLOT=3;TYPE=CELL:+64 22 123 4567
-TEL;X-EVOLUTION-UI-SLOT=2;TYPE=HOME,VOICE:+64 4 123 4567
-TEL;X-EVOLUTION-UI-SLOT=1;TYPE=WORK,VOICE:+64 22 123 4567
-FN:Andrew Watson McMillan
-END:VCARD
-</VC:address-data>
-   </prop>
-   <status>HTTP/1.1 200 OK</status>
-  </propstat>
- </response>
- <response>
-  <href>/caldav.php/user1/addressbook/donald_kelly.vcf</href>
-  <propstat>
-   <prop>
-    <getetag>some valid etag</getetag>
-    <VC:address-data>BEGIN:VCARD
-FN:Donald Kelly
-TEL;TYPE=work:+64 4 347 4747
-TEL;TYPE=cell:+64 2 1234-4321
-VERSION:2.1
-END:VCARD
-</VC:address-data>
-   </prop>
-   <status>HTTP/1.1 200 OK</status>
-  </propstat>
- </response>
- <response>
-  <href>/caldav.php/user1/addressbook/F06EC844-EACD-4ADF-8823-588603991E04-ABSPlugin.vcf</href>
-  <propstat>
-   <prop>
-    <getetag>some valid etag</getetag>
-    <VC:address-data>BEGIN:VCARD
-VERSION:3.0
-FN:Morphoss Ltd
-TEL;TYPE=WORK;TYPE=pref:+64272332426
-END:VCARD
-</VC:address-data>
-   </prop>
-   <status>HTTP/1.1 200 OK</status>
-  </propstat>
- </response>
- <response>
-  <href>/caldav.php/user1/addressbook/van_houtte.vcf</href>
-  <propstat>
-   <prop>
-    <getetag>some valid etag</getetag>
-    <VC:address-data>BEGIN:VCARD
-VERSION:3.0
-FN:Vincent VAN HOUTTE
-TEL;TYPE=CELL,VOICE:0486 11 22 33
-TEL;TYPE=HOME,VOICE:052 11 22 33
-TEL;TYPE=HOME,FAX:052 44 55 66
-TEL;TYPE=WORK,VOICE:052 11 22 33
-TEL;TYPE=WORK,FAX:052 44 55 66
-END:VCARD
-</VC:address-data>
-   </prop>
-   <status>HTTP/1.1 200 OK</status>
-  </propstat>
- </response>
- <response>
-  <href>/caldav.php/user1/addressbook/mustrmahn.vcf</href>
-  <propstat>
-   <prop>
-    <getetag>some valid etag</getetag>
-    <VC:address-data>BEGIN:VCARD
-VERSION:3.0
-FN:Überwerbung GmbH
-TEL;TYPE=WORK;TYPE=pref:+49 30 1234567
-TEL;TYPE=CELL:+49 172 1234567
-END:VCARD
-</VC:address-data>
-   </prop>
-   <status>HTTP/1.1 200 OK</status>
-  </propstat>
- </response>
- <response>
-  <href>/caldav.php/user1/addressbook/andresenesq.vcf</href>
-  <propstat>
-   <prop>
-    <getetag>some valid etag</getetag>
-    <VC:address-data>BEGIN:VCARD
-VERSION:4.0
-FN:Sven Joseph Klaus Michael Andresen\, Esq.
-TEL;TYPE=WORK,VOICE:+49 89 11 11 111
-TEL;TYPE=WORK,VOICE:+49 234 222 222
-TEL;TYPE=WORK,FAX:+49 7373 73
-TEL;TYPE=PAGER:+49 160 073 727 272
-TEL;TYPE=PAGER:+49 2626 26
-TEL;TYPE=CELL,VOICE:+49 39292 82
-TEL;TYPE=CELL,VOICE:+49 7272 722
-TEL;TYPE=PREF,VOICE:+49 12 34 567
-TEL;TYPE=CAR,VOICE:+49 8292 38 383
-TEL;TYPE=HOME,VOICE:+49 7327 272 727
-TEL;TYPE=HOME,VOICE:+49 7272 7282
-TEL;TYPE=HOME,FAX:+49 1010 1
-TEL;TYPE=ISDN:8797
-TEL;TYPE=ISDN:98732947234
-TEL;TYPE=X-EVOLUTION-RADIO:+49 88 298 723 498 32
-TEL;TYPE=X-EVOLUTION-RADIO:+49 9872 394 872 34
-TEL;TYPE=X-EVOLUTION-TELEX:+49 2763 382 882 28 82
-TEL;TYPE=X-EVOLUTION-TELEX:+49 7722 88 28 282
-TEL;TYPE=MAIN:+49 6237 623 723 84 76
-TEL;TYPE=MAIN:+49 9324 32 479 234234
-TEL;X-EVOLUTION-CALLBACK:+49 8383 73 723
-TEL;X-EVOLUTION-CALLBACK:+49 7363 6363
-TEL;TYPE=MODEM:+49 8383 73 723
-TEL;TYPE=MODEM:+49 7363 6363
-TEL;X-EVOLUTION-TTYTDD:+49 3377 37 373
-TEL;X-EVOLUTION-TTYTDD:+49 8378 33
-TEL;X-QUICKDIAL:13355
-END:VCARD
-</VC:address-data>
-   </prop>
-   <status>HTTP/1.1 200 OK</status>
-  </propstat>
- </response>
- <response>
-  <href>/caldav.php/user1/addressbook/hans_dieter.vcf</href>
-  <propstat>
-   <prop>
-    <getetag>some valid etag</getetag>
-    <VC:address-data>BEGIN:VCARD
-VERSION:4.0
-FN:Hans Dieter Schmidt
-TEL;TYPE=WORK,VOICE:+49 9823 9084
-TEL;TYPE=WORK,VOICE:+49 234 234 234
-TEL;TYPE=WORK,FAX:+49 7373 73
-TEL;TYPE=PAGER:+49 2626 26
-TEL;TYPE=CELL,VOICE:+49 7272 722
-TEL;TYPE=PREF,VOICE:+49 12 34 567
-TEL;TYPE=CAR,VOICE:+49 8292 38 383
-TEL;TYPE=HOME,VOICE:+49 7327 272 727
-TEL;TYPE=HOME,FAX:+49 40 812 387 21
-TEL;TYPE=ISDN:4234234235
-TEL;TYPE=ISDN:98732947234
-TEL;TYPE=X-EVOLUTION-RADIO:+49 9872 349 832
-TEL;TYPE=X-EVOLUTION-RADIO:+49 9872 394 872 34
-TEL;TYPE=X-EVOLUTION-TELEX:+49 38 288 228 82
-TEL;TYPE=X-EVOLUTION-TELEX:+49 7722 88 28 282
-TEL;TYPE=MAIN:+49 6237 623 723 84 76
-TEL;TYPE=MAIN:+49 9324 32 479 234234
-TEL;X-EVOLUTION-CALLBACK:+49 8383 73 723
-TEL;TYPE=MODEM:+49 8383 73 723
-TEL;X-EVOLUTION-TTYTDD:+49 7373 73
-TEL;X-EVOLUTION-TTYTDD:+49 8378 33
-END:VCARD
-</VC:address-data>
-   </prop>
-   <status>HTTP/1.1 200 OK</status>
-  </propstat>
- </response>
- <response>
-  <href>/caldav.php/user1/addressbook/J%C3%B6rg_Test-Ro%C3%9Fdeutscher_3_0.vcf</href>
-  <propstat>
-   <prop>
-    <getetag>some valid etag</getetag>
-    <VC:address-data>BEGIN:VCARD
-VERSION:3.0
-FN:Jörg Test-Roßdeutscher
-TEL;TYPE=WORK;TYPE=pref:040 999999432571-43
-TEL;TYPE=CELL:017799999978200
-TEL;TYPE=HOME:040999999793017
-END:VCARD
-</VC:address-data>
-   </prop>
-   <status>HTTP/1.1 200 OK</status>
-  </propstat>
- </response>
-</multistatus>
+<multistatus xmlns="DAV:"/>
diff --git a/testing/tests/carddav/2042-REPORT-addressbook-query.test b/testing/tests/carddav/2042-REPORT-addressbook-query.test
index 8be2fa20..d35bdf6d 100644
--- a/testing/tests/carddav/2042-REPORT-addressbook-query.test
+++ b/testing/tests/carddav/2042-REPORT-addressbook-query.test
@@ -3,9 +3,18 @@
 #
 # param-filter should filter on parameter value. With a negated
 # null value we should return all vCards with the property that
-# matches the prop-filter type, and there there is a parameter
+# matches the prop-filter type, and where there is a parameter
 # of TYPE set.
 #
+# NOTE: This test does not do what one would think it does!
+# Testing if a parameter is-defined (is not NULL) is the default case
+# and can be achieved with just an empty param-filter, like
+#   <C:param-filter name="TYPE"/>
+# However searching for an empty string within another string (as
+# opposed to testing whether they are equal) should always succeed, and
+# negating that will always fail, hence this test should return no
+# results.
+#
 TYPE=REPORT
 URL=http://regression.host/caldav.php/user1/addressbook/