diff --git a/t/t9501-gitweb-standalone-http-status.sh b/t/t9501-gitweb-standalone-http-status.sh
index ef86948d21..d3a5bac754 100755
--- a/t/t9501-gitweb-standalone-http-status.sh
+++ b/t/t9501-gitweb-standalone-http-status.sh
@@ -130,7 +130,8 @@ test_expect_success DATE_PARSER 'modification: feed last-modified' '
 test_debug 'cat gitweb.headers'
 
 test_expect_success DATE_PARSER 'modification: feed if-modified-since (modified)' '
-	export HTTP_IF_MODIFIED_SINCE="Wed, 6 Apr 2005 22:14:13 +0000" &&
+	HTTP_IF_MODIFIED_SINCE="Wed, 6 Apr 2005 22:14:13 +0000" &&
+	export HTTP_IF_MODIFIED_SINCE &&
 	test_when_finished "unset HTTP_IF_MODIFIED_SINCE" &&
 	gitweb_run "p=.git;a=atom;h=master" &&
 	grep "Status: 200 OK" gitweb.headers
@@ -138,7 +139,8 @@ test_expect_success DATE_PARSER 'modification: feed if-modified-since (modified)
 test_debug 'cat gitweb.headers'
 
 test_expect_success DATE_PARSER 'modification: feed if-modified-since (unmodified)' '
-	export HTTP_IF_MODIFIED_SINCE="Thu, 7 Apr 2005 22:14:13 +0000" &&
+	HTTP_IF_MODIFIED_SINCE="Thu, 7 Apr 2005 22:14:13 +0000" &&
+	export HTTP_IF_MODIFIED_SINCE &&
 	test_when_finished "unset HTTP_IF_MODIFIED_SINCE" &&
 	gitweb_run "p=.git;a=atom;h=master" &&
 	grep "Status: 304 Not Modified" gitweb.headers
@@ -153,7 +155,8 @@ test_expect_success DATE_PARSER 'modification: snapshot last-modified' '
 test_debug 'cat gitweb.headers'
 
 test_expect_success DATE_PARSER 'modification: snapshot if-modified-since (modified)' '
-	export HTTP_IF_MODIFIED_SINCE="Wed, 6 Apr 2005 22:14:13 +0000" &&
+	HTTP_IF_MODIFIED_SINCE="Wed, 6 Apr 2005 22:14:13 +0000" &&
+	export HTTP_IF_MODIFIED_SINCE &&
 	test_when_finished "unset HTTP_IF_MODIFIED_SINCE" &&
 	gitweb_run "p=.git;a=snapshot;h=master;sf=tgz" &&
 	grep "Status: 200 OK" gitweb.headers
@@ -161,7 +164,8 @@ test_expect_success DATE_PARSER 'modification: snapshot if-modified-since (modif
 test_debug 'cat gitweb.headers'
 
 test_expect_success DATE_PARSER 'modification: snapshot if-modified-since (unmodified)' '
-	export HTTP_IF_MODIFIED_SINCE="Thu, 7 Apr 2005 22:14:13 +0000" &&
+	HTTP_IF_MODIFIED_SINCE="Thu, 7 Apr 2005 22:14:13 +0000" &&
+	export HTTP_IF_MODIFIED_SINCE &&
 	test_when_finished "unset HTTP_IF_MODIFIED_SINCE" &&
 	gitweb_run "p=.git;a=snapshot;h=master;sf=tgz" &&
 	grep "Status: 304 Not Modified" gitweb.headers
@@ -170,7 +174,8 @@ test_debug 'cat gitweb.headers'
 
 test_expect_success DATE_PARSER 'modification: tree snapshot' '
 	ID=`git rev-parse --verify HEAD^{tree}` &&
-	export HTTP_IF_MODIFIED_SINCE="Wed, 6 Apr 2005 22:14:13 +0000" &&
+	HTTP_IF_MODIFIED_SINCE="Wed, 6 Apr 2005 22:14:13 +0000" &&
+	export HTTP_IF_MODIFIED_SINCE &&
 	test_when_finished "unset HTTP_IF_MODIFIED_SINCE" &&
 	gitweb_run "p=.git;a=snapshot;h=$ID;sf=tgz" &&
 	grep "Status: 200 OK" gitweb.headers &&