diff --git a/t/lib-httpd.sh b/t/lib-httpd.sh
index d154d1ed1d..e6adf2f82d 100644
--- a/t/lib-httpd.sh
+++ b/t/lib-httpd.sh
@@ -79,6 +79,7 @@ HTTPD_DOCUMENT_ROOT_PATH=$HTTPD_ROOT_PATH/www
 # hack to suppress apache PassEnv warnings
 GIT_VALGRIND=$GIT_VALGRIND; export GIT_VALGRIND
 GIT_VALGRIND_OPTIONS=$GIT_VALGRIND_OPTIONS; export GIT_VALGRIND_OPTIONS
+GIT_TRACE=$GIT_TRACE; export GIT_TRACE
 
 if ! test -x "$LIB_HTTPD_PATH"
 then
diff --git a/t/lib-httpd/apache.conf b/t/lib-httpd/apache.conf
index 03a4c2ee84..0b81a0047b 100644
--- a/t/lib-httpd/apache.conf
+++ b/t/lib-httpd/apache.conf
@@ -70,6 +70,7 @@ PassEnv GIT_VALGRIND
 PassEnv GIT_VALGRIND_OPTIONS
 PassEnv GNUPGHOME
 PassEnv ASAN_OPTIONS
+PassEnv GIT_TRACE
 
 Alias /dumb/ www/
 Alias /auth/dumb/ www/auth/dumb/