diff --git a/report/verification/mms/heat_transfer.md b/report/verification/mms/heat_transfer.md
index e2e4534..9293268 100644
--- a/report/verification/mms/heat_transfer.md
+++ b/report/verification/mms/heat_transfer.md
@@ -11,7 +11,7 @@ jupytext:
 
 # Heat transfer multi-material
 
-```{tags} 2D, MMS, HeatTransferProblem
+```{tags} 2D, MMS, HeatTransferProblem, Multi-material
 ```
 
 This case verifies the implementation of the heat transfer solver in FESTIM.
diff --git a/report/verification/mms/trapping.md b/report/verification/mms/trapping.md
index 289dbaa..141ea86 100644
--- a/report/verification/mms/trapping.md
+++ b/report/verification/mms/trapping.md
@@ -10,7 +10,7 @@ jupytext:
 
 # Single trap
 
-```{tags} 2D, MMS, Trapping
+```{tags} 2D, MMS, Trapping, Multi-material
 ```
 
 The MMS case verifies the implementation of trapping in FESTIM.