1 files changed, 5 insertions, 1 deletions
diff --git a/src/test/interfaces_tests.cpp b/src/test/interfaces_tests.cpp
index 49b7d2003b..cb901b2259 100644
--- a/src/test/interfaces_tests.cpp
+++ b/src/test/interfaces_tests.cpp
@@ -17,6 +17,7 @@ BOOST_FIXTURE_TEST_SUITE(interfaces_tests, TestChain100Setup)
 
 BOOST_AUTO_TEST_CASE(findBlock)
 {
+    LOCK(Assert(m_node.chainman)->GetMutex());
     auto& chain = m_node.chain;
     const CChain& active = Assert(m_node.chainman)->ActiveChain();
 
@@ -61,6 +62,7 @@ BOOST_AUTO_TEST_CASE(findBlock)
 
 BOOST_AUTO_TEST_CASE(findFirstBlockWithTimeAndHeight)
 {
+    LOCK(Assert(m_node.chainman)->GetMutex());
     auto& chain = m_node.chain;
     const CChain& active = Assert(m_node.chainman)->ActiveChain();
     uint256 hash;
@@ -73,6 +75,7 @@ BOOST_AUTO_TEST_CASE(findFirstBlockWithTimeAndHeight)
 
 BOOST_AUTO_TEST_CASE(findAncestorByHeight)
 {
+    LOCK(Assert(m_node.chainman)->GetMutex());
     auto& chain = m_node.chain;
     const CChain& active = Assert(m_node.chainman)->ActiveChain();
     uint256 hash;
@@ -83,6 +86,7 @@ BOOST_AUTO_TEST_CASE(findAncestorByHeight)
 
 BOOST_AUTO_TEST_CASE(findAncestorByHash)
 {
+    LOCK(Assert(m_node.chainman)->GetMutex());
     auto& chain = m_node.chain;
     const CChain& active = Assert(m_node.chainman)->ActiveChain();
     int height = -1;
@@ -94,7 +98,7 @@ BOOST_AUTO_TEST_CASE(findAncestorByHash)
 BOOST_AUTO_TEST_CASE(findCommonAncestor)
 {
     auto& chain = m_node.chain;
-    const CChain& active = Assert(m_node.chainman)->ActiveChain();
+    const CChain& active = WITH_LOCK(Assert(m_node.chainman)->GetMutex(), return Assert(m_node.chainman)->ActiveChain());
     auto* orig_tip = active.Tip();
     for (int i = 0; i < 10; ++i) {
         BlockValidationState state;