diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9d87609c0..2d67968ea 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -159,6 +159,13 @@ jobs:
           export PATH="$GITHUB_WORKSPACE/rust/target/debug:$PATH"
           bash ./test.sh
 
+      - name: Sync miner blocks between local nodes
+        working-directory: tests/network/04-sync-miner-blocks
+        timeout-minutes: 5
+        run: |
+          export PATH="$GITHUB_WORKSPACE/rust/target/debug:$PATH"
+          bash ./test.sh
+
       - name: Mine and persist a local block
         working-directory: tests/network/05-mining
         timeout-minutes: 6
diff --git a/docs/roadmaps/roadmap.md b/docs/roadmaps/roadmap.md
index a13b39ec3..a10ceddcd 100644
--- a/docs/roadmaps/roadmap.md
+++ b/docs/roadmaps/roadmap.md
@@ -38,7 +38,9 @@ For live access, start with [Join the public testnet](../cli/join-testnet.md).
   and workspace Clippy. These cover network crates as workspace members. CI also
   builds `modal` and runs the numbered `01-ping-node` and
   `02-run-devnet1` scenarios: the first boots and pings from a second node,
-  the second certifies a local static-sequencer round, and `05-mining` mines,
+  the second certifies a local static-sequencer round, `04-sync-miner-blocks`
+  syncs 120 fixture blocks between local nodes and checks duplicate syncs are
+  no-ops, and `05-mining` mines,
   inspects, persists, and resumes a solo devnet block. The remaining numbered
   scenarios are not yet CI gates.
 - [x] A small [hybrid consensus experiment](../../experiments/hybrid-consensus/README.md)
diff --git a/tests/network/04-sync-miner-blocks/configs/node1.json b/tests/network/04-sync-miner-blocks/configs/node1.json
index 534316bb1..e99a43b36 100644
--- a/tests/network/04-sync-miner-blocks/configs/node1.json
+++ b/tests/network/04-sync-miner-blocks/configs/node1.json
@@ -1,6 +1,6 @@
 {
+  "config_version": 2,
   "passfile_path": "../../../../fixtures/passfiles/node1.mod_passfile",
   "data_dir": "../tmp/storage/node1",
   "listeners": ["/ip4/0.0.0.0/tcp/10201/ws"]
 }
-
diff --git a/tests/network/04-sync-miner-blocks/configs/node2.json b/tests/network/04-sync-miner-blocks/configs/node2.json
index a524be95d..564de54b6 100644
--- a/tests/network/04-sync-miner-blocks/configs/node2.json
+++ b/tests/network/04-sync-miner-blocks/configs/node2.json
@@ -1,6 +1,6 @@
 {
+  "config_version": 2,
   "passfile_path": "../../../../fixtures/passfiles/node2.mod_passfile",
   "storage_path": "../tmp/storage/node2",
   "listeners": ["/ip4/0.0.0.0/tcp/10202/ws"]
 }
-
diff --git a/tests/network/04-sync-miner-blocks/test.sh b/tests/network/04-sync-miner-blocks/test.sh
index 63455e887..61f0644de 100755
--- a/tests/network/04-sync-miner-blocks/test.sh
+++ b/tests/network/04-sync-miner-blocks/test.sh
@@ -60,57 +60,40 @@ assert_output_contains \
     "Total Blocks" \
     "Node2 should have synced blocks"
 
-# Test 7: Test epoch sync
+# Test 7: Re-sync the complete chain without clearing node2. It must be a no-op.
 echo ""
-echo "Test 7: Testing epoch sync..."
+echo "Test 7: Testing sync idempotency..."
+assert_output_contains \
+    "./03-sync-all-blocks.sh" \
+    "Blocks persisted: 0" \
+    "Re-sync should not persist duplicate blocks"
+
+# Test 8: Test epoch sync
+echo ""
+echo "Test 8: Testing epoch sync..."
 rm -rf ./configs/tmp/storage/node2 2>/dev/null || true
 rm -rf ./tmp/storage/node2 2>/dev/null || true
 assert_success \
     "./04-sync-epoch.sh 0" \
     "Sync epoch 0 should succeed"
 
-# Test 8: Test range sync
+# Test 9: Test range sync
 echo ""
-echo "Test 8: Testing range sync..."
+echo "Test 9: Testing range sync..."
 rm -rf ./configs/tmp/storage/node2 2>/dev/null || true
 rm -rf ./tmp/storage/node2 2>/dev/null || true
 assert_success \
     "./05-sync-range.sh 0 10" \
     "Sync range 0-10 should succeed"
 
-# Test 9: Test JSON output
+# Test 10: Test JSON output
 echo ""
-echo "Test 9: Testing JSON output format..."
+echo "Test 10: Testing JSON output format..."
 assert_output_contains \
     "./06-view-blocks-json.sh" \
     "blocks" \
     "JSON output should contain blocks field"
 
-# Test 10: Test idempotency (re-sync should skip duplicates)
-echo ""
-echo "Test 10: Testing sync idempotency..."
-RESYNC_OUTPUT=$(./03-sync-all-blocks.sh 2>&1 || true)
-echo "Re-sync output: $RESYNC_OUTPUT" >> "$CURRENT_LOG"
-# Re-syncing should either show "Blocks persisted: 0" (all skipped) or show some skipped blocks
-# The format is "Blocks persisted: N" where N should be 0 for fully idempotent sync
-if echo "$RESYNC_OUTPUT" | grep -q "Blocks persisted: 0"; then
-    TESTS_RUN=$((TESTS_RUN + 1))
-    TESTS_PASSED=$((TESTS_PASSED + 1))
-    echo -e "  ${GREEN}✓${NC} Re-sync should skip duplicate blocks"
-else
-    # Check if some blocks were skipped (partial idempotency is acceptable for now)
-    PERSISTED=$(echo "$RESYNC_OUTPUT" | grep "Blocks persisted:" | sed -E 's/.*Blocks persisted: ([0-9]+).*/\1/' || echo "")
-    if [ ! -z "$PERSISTED" ] && [ "$PERSISTED" -lt 120 ]; then
-        TESTS_RUN=$((TESTS_RUN + 1))
-        TESTS_PASSED=$((TESTS_PASSED + 1))
-        echo -e "  ${GREEN}✓${NC} Re-sync partially skipped duplicate blocks ($PERSISTED/120 persisted)"
-    else
-        TESTS_RUN=$((TESTS_RUN + 1))
-        TESTS_FAILED=$((TESTS_FAILED + 1))
-        echo -e "  ${RED}✗${NC} Re-sync should skip duplicate blocks"
-    fi
-fi
-
 # Finalize test
 test_finalize
 exit $?