diff --git a/Makefile.pre.in b/Makefile.pre.in
index 0ce1e9ef13fdbc..3df33d98e32432 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -1225,7 +1225,7 @@ regen-limited-abi: all
 ############################################################################
 # Regenerate all generated files
 
-regen-all: regen-opcode regen-opcode-targets regen-typeslots \
+regen-all: regen-cases regen-opcode regen-opcode-targets regen-typeslots \
 	regen-token regen-ast regen-keyword regen-sre regen-frozen clinic \
 	regen-pegen-metaparser regen-pegen regen-test-frozenmain \
 	regen-test-levenshtein regen-global-objects