diff --git a/glean-core/android/proguard-rules-consumer.pro b/glean-core/android/proguard-rules-consumer.pro
index 3197648e6d..0ca6fc735b 100644
--- a/glean-core/android/proguard-rules-consumer.pro
+++ b/glean-core/android/proguard-rules-consumer.pro
@@ -8,3 +8,9 @@
 
 # Glean specific rules
 -keep class mozilla.telemetry.** { *; }
+
+# The Glean SDK ships with classes used for tests as well. They are disabled
+# and not directly usable in production code: they throw if used there. They
+# can be used in tests just fine but, outside of tests, the test dependency
+# they use won't be there, hence the warning. It's safe to suppress these.
+-dontwarn mozilla.telemetry.glean.testing.**