diff --git a/src/ripple/app/paths/impl/FlowDebugInfo.h b/src/ripple/app/paths/impl/FlowDebugInfo.h
index 62d4841906..f0334d514e 100644
--- a/src/ripple/app/paths/impl/FlowDebugInfo.h
+++ b/src/ripple/app/paths/impl/FlowDebugInfo.h
@@ -229,21 +229,21 @@ struct FlowDebugInfo
                 }
                 ostr << ']';
             };
-            auto writeXrpAmtList = [&ostr, &write_list](
+            auto writeXrpAmtList = [&write_list](
                 std::vector<EitherAmount> const& amts, char delim=';') {
                 auto get_val = [](EitherAmount const& a) -> std::string {
                     return ripple::to_string (a.xrp);
                 };
                 write_list (amts, get_val, delim);
             };
-            auto writeIouAmtList = [&ostr, &write_list](
+            auto writeIouAmtList = [&write_list](
                 std::vector<EitherAmount> const& amts, char delim=';') {
                 auto get_val = [](EitherAmount const& a) -> std::string {
                     return ripple::to_string (a.iou);
                 };
                 write_list (amts, get_val, delim);
             };
-            auto writeIntList = [&ostr, &write_list](
+            auto writeIntList = [&write_list](
                 std::vector<size_t> const& vals, char delim=';') {
                 auto get_val = [](
                     size_t const& v) -> size_t const& { return v; };
diff --git a/src/test/app/Flow_test.cpp b/src/test/app/Flow_test.cpp
index 5b04ec087d..521addc5c3 100644
--- a/src/test/app/Flow_test.cpp
+++ b/src/test/app/Flow_test.cpp
@@ -783,7 +783,7 @@ struct Flow_test : public beast::unit_test::suite
     {
         std::vector<std::shared_ptr<SLE const>> result;
         forEachItem (*env.current (), account,
-            [&env, &result](std::shared_ptr<SLE const> const& sle)
+            [&result](std::shared_ptr<SLE const> const& sle)
             {
                 if (sle->getType() == ltOFFER)
                      result.push_back (sle);
diff --git a/src/test/app/Offer_test.cpp b/src/test/app/Offer_test.cpp
index 861a9baa54..db66854098 100644
--- a/src/test/app/Offer_test.cpp
+++ b/src/test/app/Offer_test.cpp
@@ -569,7 +569,7 @@ public:
     {
         std::vector<std::shared_ptr<SLE const>> result;
         forEachItem (*env.current (), account,
-            [&env, &result](std::shared_ptr<SLE const> const& sle)
+            [&result](std::shared_ptr<SLE const> const& sle)
             {
                 if (sle->getType() == ltOFFER)
                      result.push_back (sle);
diff --git a/src/test/protocol/STTx_test.cpp b/src/test/protocol/STTx_test.cpp
index 4e7ad6a6cf..54795b39a9 100644
--- a/src/test/protocol/STTx_test.cpp
+++ b/src/test/protocol/STTx_test.cpp
@@ -128,7 +128,7 @@ public:
 
         // This lambda contains the bulk of the test code.
         auto testMalformedSigningAccount =
-            [this, &txn, &id1]
+            [this, &txn]
                 (STObject const& signer, bool expectPass)
         {
             // Create SigningAccounts array.