diff --git a/README.md b/README.md
index 2c3734ae1277c5250754eebd13db44061998858d..e56087b4ebbda765ab94152512e40c9c19d6b4d7 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@
 - prototyping updates, trials, investigations
     - PPE
         - testing
-            - https://gitlab.cba.mit.edu/pub/coronavirus/tracking/-/blob/master/README.md
+            - https://gitlab.cba.mit.edu/camblackburn/filter_testing
         - shields
             - https://gitlab.cba.mit.edu/zfredin/quickshield
             - https://gitlab.cba.mit.edu/alfonso/covid19-fast-kirishield