diff --git a/requirements-test.txt b/requirements-test.txt
index 1685f99d..4f2ab05e 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -14,7 +14,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 -r requirements.txt
-SpiNNakerTestBase >= 1!5.1.1, < 1!6.0.0
+SpiNNakerTestBase == 1!6.0.0
 flake8
 coverage >= 4.4, < 5.0
 # pytest will be brought in by pytest-cov