diff --git a/src/init.cpp b/src/init.cpp
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -2567,7 +2567,7 @@
                 chainman.m_total_coinstip_cache = nCoinCacheUsage;
                 chainman.m_total_coinsdb_cache = nCoinDBCache;
 
-                UnloadBlockIndex(node.mempool.get());
+                UnloadBlockIndex(node.mempool.get(), chainman);
 
                 // new CBlockTreeDB tries to delete the existing file, which
                 // fails if it's still open from the previous loop. Close it
diff --git a/src/qt/test/apptests.cpp b/src/qt/test/apptests.cpp
--- a/src/qt/test/apptests.cpp
+++ b/src/qt/test/apptests.cpp
@@ -105,8 +105,11 @@
     // Reset global state to avoid interfering with later tests.
     LogInstance().DisconnectTestLogger();
     AbortShutdown();
-    UnloadBlockIndex(/* mempool */ nullptr);
-    WITH_LOCK(::cs_main, g_chainman.Reset());
+    {
+        LOCK(cs_main);
+        UnloadBlockIndex(/* mempool */ nullptr, g_chainman);
+        g_chainman.Reset();
+    }
 }
 
 //! Entry point for BitcoinGUI tests.
diff --git a/src/test/util/setup_common.cpp b/src/test/util/setup_common.cpp
--- a/src/test/util/setup_common.cpp
+++ b/src/test/util/setup_common.cpp
@@ -229,7 +229,7 @@
     m_node.connman.reset();
     m_node.banman.reset();
     m_node.args = nullptr;
-    UnloadBlockIndex(m_node.mempool.get());
+    UnloadBlockIndex(m_node.mempool.get(), *m_node.chainman);
     m_node.mempool.reset();
     m_node.scheduler.reset();
     m_node.chainman->Reset();
diff --git a/src/validation.h b/src/validation.h
--- a/src/validation.h
+++ b/src/validation.h
@@ -224,7 +224,7 @@
 /**
  * Unload database information.
  */
-void UnloadBlockIndex(CTxMemPool *mempool);
+void UnloadBlockIndex(CTxMemPool *mempool, ChainstateManager &chainman);
 
 /**
  * Run an instance of the script checking thread.
diff --git a/src/validation.cpp b/src/validation.cpp
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -5200,9 +5200,9 @@
 // May NOT be used after any connections are up as much
 // of the peer-processing logic assumes a consistent
 // block index state
-void UnloadBlockIndex(CTxMemPool *mempool) {
+void UnloadBlockIndex(CTxMemPool *mempool, ChainstateManager &chainman) {
     LOCK(cs_main);
-    g_chainman.Unload();
+    chainman.Unload();
     pindexBestInvalid = nullptr;
     pindexBestParked = nullptr;
     pindexBestHeader = nullptr;