diff --git a/tests/simulation/start.sh b/tests/simulation/start.sh
index d8e818cd0..cd8f60755 100755
--- a/tests/simulation/start.sh
+++ b/tests/simulation/start.sh
@@ -53,6 +53,7 @@ CUSTOM_NIMFLAGS="${NIMFLAGS} -d:useSysAsserts -d:chronicles_sinks:textlines,json
 
 # Run with "SLOTS_PER_EPOCH=8 ./start.sh" to change these
 DEFS=""
+DEFS+="-d:MIN_GENESIS_ACTIVE_VALIDATOR_COUNT=${NUM_VALIDATORS} "
 DEFS+="-d:MAX_COMMITTEES_PER_SLOT=${MAX_COMMITTEES_PER_SLOT:-1} "      # Spec default: 64
 DEFS+="-d:SLOTS_PER_EPOCH=${SLOTS_PER_EPOCH:-6} "   # Spec default: 32
 DEFS+="-d:SECONDS_PER_SLOT=${SECONDS_PER_SLOT:-6} "  # Spec default: 12
@@ -74,7 +75,7 @@ COMMANDS=()
 
 if [[ "$USE_GANACHE" == "yes" ]]; then
   if [[ "$USE_TMUX" == "yes" ]]; then
-    $TMUX_CMD new-window -d -t $TMUX_SESSION_NAME -n "$GANACHE_CMD" "$GANACHE_CMD -e 100000"
+    $TMUX_CMD new-window -d -t $TMUX_SESSION_NAME -n "$GANACHE_CMD" "$GANACHE_CMD --blockTime 5 --gasLimit 100000000 -e 100000"
   else
     echo NOTICE: $GANACHE_CMD will be started automatically only with USE_TMUX=1
     USE_GANACHE="no"
@@ -167,7 +168,7 @@ if [ "$USE_GANACHE" != "no" ]; then
     run_cmd "(deposit maker)" "$BEACON_NODE_BIN deposits send \
       --non-interactive \
       --deposits-dir='$VALIDATORS_DIR' \
-      --min-delay=1 --max-delay=5 \
+      --min-delay=0 --max-delay=1 \
       $WEB3_ARG \
       --deposit-contract=${DEPOSIT_CONTRACT_ADDRESS}"
   fi