diff --git a/contrib/teamcity/build.sh b/contrib/teamcity/build.sh
--- a/contrib/teamcity/build.sh
+++ b/contrib/teamcity/build.sh
@@ -86,11 +86,11 @@
 		if [[ ! -z "${DISABLE_WALLET}" ]]; then
 			echo "Skipping rpc testing due to disabled wallet functionality."
 		elif [[ "${BRANCH}" == "master" ]]; then
-			./test/functional/test_runner.py -ju="${JUNIT_DEFAULT}" --cutoff=600 --tmpdirprefix=output
-			./test/functional/test_runner.py -ju="${JUNIT_NEXT_UPGRADE}" --cutoff=600 --tmpdirprefix=output --with-gravitonactivation
+			./test/functional/test_runner.py -J="${JUNIT_DEFAULT}" --cutoff=600 --tmpdirprefix=output
+			./test/functional/test_runner.py -J="${JUNIT_NEXT_UPGRADE}" --cutoff=600 --tmpdirprefix=output --with-gravitonactivation
 		else
-			./test/functional/test_runner.py -ju="${JUNIT_DEFAULT}" --tmpdirprefix=output
-			./test/functional/test_runner.py -ju="${JUNIT_NEXT_UPGRADE}" --tmpdirprefix=output --with-gravitonactivation
+			./test/functional/test_runner.py -J="${JUNIT_DEFAULT}" --tmpdirprefix=output
+			./test/functional/test_runner.py -J="${JUNIT_NEXT_UPGRADE}" --tmpdirprefix=output --with-gravitonactivation
 		fi
 	else
 		echo "*** Functional tests have been skipped"
diff --git a/test/functional/test_runner.py b/test/functional/test_runner.py
--- a/test/functional/test_runner.py
+++ b/test/functional/test_runner.py
@@ -174,7 +174,7 @@
                         help='only print results summary and failure logs')
     parser.add_argument('--tmpdirprefix', '-t',
                         default=tempfile.gettempdir(), help="Root directory for datadirs")
-    parser.add_argument('--junitoutput', '-ju',
+    parser.add_argument('--junitoutput', '-J',
                         default=os.path.join(build_dir, 'junit_results.xml'), help="file that will store JUnit formatted test results.")
 
     args, unknown_args = parser.parse_known_args()