diff --git a/0104-curl-7.88.0-tests-warnings.patch b/0104-curl-7.88.0-tests-warnings.patch
new file mode 100644
index 0000000..dff89f9
--- /dev/null
+++ b/0104-curl-7.88.0-tests-warnings.patch
@@ -0,0 +1,30 @@
+From d506d885aa16b4a87acbac082eea41dccdc7b69f Mon Sep 17 00:00:00 2001
+From: Kamil Dudka <kdudka@redhat.com>
+Date: Wed, 15 Feb 2023 10:42:38 +0100
+Subject: [PATCH] Revert "runtests: consider warnings fatal and error on them"
+
+While it might be useful for upstream developers, it is not so useful
+for downstream consumers.
+
+This reverts upstream commit 22f795c834cfdbacbb1b55426028a581e3cf67a8.
+---
+ tests/runtests.pl | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+diff --git a/tests/runtests.pl b/tests/runtests.pl
+index 71644ad18..0cf85c3fe 100755
+--- a/tests/runtests.pl
++++ b/tests/runtests.pl
+@@ -75,8 +75,7 @@ BEGIN {
+ }
+ 
+ use strict;
+-# Promote all warnings to fatal
+-use warnings FATAL => 'all';
++use warnings;
+ use Cwd;
+ use Digest::MD5 qw(md5);
+ use MIME::Base64;
+-- 
+2.39.1
+
diff --git a/curl.spec b/curl.spec
index 7207a18..7d58071 100644
--- a/curl.spec
+++ b/curl.spec
@@ -19,6 +19,9 @@ Patch102: 0102-curl-7.84.0-test3026.patch
 # test3012: temporarily disable valgrind (#2143040)
 Patch103: 0103-curl-7.87.0-test3012.patch
 
+# do not fail on warnings in the upstream test driver
+Patch104: 0104-curl-7.88.0-tests-warnings.patch
+
 Provides: curl-full = %{version}-%{release}
 Provides: webclient
 URL: https://curl.se/
@@ -202,6 +205,7 @@ be installed.
 %patch101 -p1
 %patch102 -p1
 %patch103 -p1
+%patch104 -p1
 
 # disable test 1112 (#565305), test 1455 (occasionally fails with 'bind failed
 # with errno 98: Address already in use' in Koji environment), and test 1801