diff --git a/mull.yml b/mull.yml
index 2a01478c2..a21e5e27e 100644
--- a/mull.yml
+++ b/mull.yml
@@ -23,6 +23,7 @@ mutators:
 #- cxx_lt_to_le  # Replaces < with <=  # TODO(correaa) investigates why this mutant survices with the range.contains function
  - cxx_mul_to_div  # Replaces / with *
 timeout: 1000 # in milliseconds
+slowIRVerification: true
 quiet: true # additional logging?
 excludePaths:
   - .*test.*