diff --git a/bind-9.11-unit-dnstap-pkcs11.patch b/bind-9.11-unit-dnstap-pkcs11.patch
new file mode 100644
index 0000000..60cc1cd
--- /dev/null
+++ b/bind-9.11-unit-dnstap-pkcs11.patch
@@ -0,0 +1,38 @@
+From dca9eea70cb33062905aefc389266da931e9d0d6 Mon Sep 17 00:00:00 2001
+From: Petr Mensik <pemensik@redhat.com>
+Date: Thu, 14 Mar 2019 15:48:37 +0100
+Subject: [PATCH] Set TZ again before dns library is initialized
+
+PKCS11 uses it, initializes TZ offset from dst init. Setting environment
+in test is too late since use of cmocka.
+---
+ lib/dns/tests/dnstap_test.c | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/lib/dns/tests/dnstap_test.c b/lib/dns/tests/dnstap_test.c
+index 22d6dc3..5a60b12 100644
+--- a/lib/dns/tests/dnstap_test.c
++++ b/lib/dns/tests/dnstap_test.c
+@@ -309,9 +309,6 @@ totext_test(void **state) {
+ 
+ 	UNUSED(state);
+ 
+-	/* make sure text conversion gets the right local time */
+-	setenv("TZ", "PST8", 1);
+-
+ 	result = dns_dt_open(TAPSAVED, dns_dtmode_file, mctx, &handle);
+ 	assert_int_equal(result, ISC_R_SUCCESS);
+ 
+@@ -378,6 +375,9 @@ main(void) {
+ 		cmocka_unit_test_setup_teardown(totext_test, _setup, _teardown),
+ 	};
+ 
++	/* make sure text conversion gets the right local time */
++	setenv("TZ", "PST8", 1);
++
+ 	return (cmocka_run_group_tests(tests, dns_test_init, dns_test_final));
+ #else
+ 	print_message("1..0 # Skip dnstap not enabled\n");
+-- 
+2.20.1
+
diff --git a/bind.spec b/bind.spec
index 09544bb..286613f 100644
--- a/bind.spec
+++ b/bind.spec
@@ -53,7 +53,7 @@ Summary:  The Berkeley Internet Name Domain (BIND) DNS (Domain Name System) serv
 Name:     bind
 License:  MPLv2.0
 Version:  9.11.6
-Release:  1%{?PATCHVER:.%{PATCHVER}}%{?PREVER:.%{PREVER}}%{?dist}
+Release:  2%{?PATCHVER:.%{PATCHVER}}%{?PREVER:.%{PREVER}}%{?dist}
 Epoch:    32
 Url:      https://www.isc.org/downloads/bind/
 #
@@ -139,6 +139,7 @@ Patch169:bind-9.11-feature-test-dlz.patch
 Patch170:bind-9.11-feature-test-named.patch
 Patch171:bind-9.11-tests-variants.patch
 Patch172:bind-9.11-tests-pkcs11.patch
+Patch173: bind-9.11-unit-dnstap-pkcs11.patch
 
 # SDB patches
 Patch11: bind-9.3.2b2-sdbsrc.patch
@@ -518,6 +519,7 @@ are used for building ISC DHCP.
 %patch170 -p1 -b .featuretest-named
 %patch171 -p1 -b .test-variant
 %patch172 -p1 -b .test-pkcs11
+%patch173 -p1 -b .unit-dnstap
 
 mkdir lib/dns/tests/testdata/dstrandom
 cp -a %{SOURCE50} lib/dns/tests/testdata/dstrandom/random.data
@@ -1500,6 +1502,9 @@ fi;
 
 
 %changelog
+* Thu Mar 14 2019 Petr Menšík <pemensik@redhat.com> - 32:9.11.6-2
+- Fix dnstap issue in unit test once again
+
 * Tue Mar 05 2019 Petr Menšík <pemensik@redhat.com> - 32:9.11.6-1
 - Update to 9.11.6