diff --git a/fboss/thrift_cow/nodes/tests/test.thrift b/fboss/thrift_cow/nodes/tests/test.thrift
index babed4fb68f35..5667f1ba9b371 100644
--- a/fboss/thrift_cow/nodes/tests/test.thrift
+++ b/fboss/thrift_cow/nodes/tests/test.thrift
@@ -34,6 +34,9 @@ struct ChildStruct {
   1: map<i32, bool> childMap;
   2: map<string, i32> strMap;
   3: map<string, switch_config.L4PortRange> structMap;
+  4: list<switch_config.L4PortRange> listOfStruct;
+  5: i32 leafI32;
+  6: optional TestEnum optionalEnum;
 }
 
 struct TestStruct {
@@ -75,7 +78,10 @@ struct TestStruct {
   29: set<i32> hybridSet (allow_skip_thrift_cow = true);
   30: TestUnion hybridUnion (allow_skip_thrift_cow = true);
   31: ChildStruct hybridStruct (allow_skip_thrift_cow = true);
-  32: map<i32, switch_config.L4PortRange> hybridMapOfI32ToStruct (
+  // hybridMapOfI32ToStruct is crafted to cover deeper accesses inside HybridNode, with
+  // paths that terminate at primitive leaves, intermediate containers (list, map, struct)
+  // in UTs for various visitors: PathVisitor, RecurseVisitor, DeltaVisitor
+  32: map<i32, ChildStruct> hybridMapOfI32ToStruct (
     allow_skip_thrift_cow = true,
   );
   33: map<i32, map<i32, i32>> hybridMapOfMap (allow_skip_thrift_cow = true);
@@ -84,8 +90,21 @@ struct TestStruct {
   );
 }
 
+// structs declared to mimic deeper Thrift path accesses
 struct ParentTestStruct {
   1: TestStruct childStruct;
+  2: map<i32, map<string, TestStruct>> mapOfI32ToMapOfStruct;
+}
+
+struct RootTestStruct {
+  1: map<i32, map<string, ParentTestStruct>> mapOfI32ToMapOfStruct;
+  2: list<ParentTestStruct> listOfStruct;
+  3: ParentTestStruct inlineStruct;
+}
+
+// structs declared exclusively for testing Thrift annotations.
+struct TestStructForAnnotation1 {
+  1: TestStruct childStruct;
 } (random_annotation)
 
 struct TestStruct2 {
diff --git a/fboss/thrift_cow/visitors/tests/RecurseVisitorTests.cpp b/fboss/thrift_cow/visitors/tests/RecurseVisitorTests.cpp
index d2e65a8047d3e..705621bc3c20a 100644
--- a/fboss/thrift_cow/visitors/tests/RecurseVisitorTests.cpp
+++ b/fboss/thrift_cow/visitors/tests/RecurseVisitorTests.cpp
@@ -42,8 +42,9 @@ folly::dynamic createTestDynamic() {
       "hybridMap", dynamic::object())("hybridList", dynamic::array())(
       "hybridSet", dynamic::array())("hybridUnion", dynamic::object())(
       "hybridStruct",
-      dynamic::object("childMap", dynamic::object())(
-          "strMap", dynamic::object())("structMap", dynamic::object()))(
+      dynamic::object("childMap", dynamic::object())("leafI32", 0)(
+          "listOfStruct", dynamic::array())("strMap", dynamic::object())(
+          "structMap", dynamic::object()))(
       "hybridMapOfI32ToStruct", dynamic::object())(
       "hybridMapOfMap", dynamic::object());
 }
@@ -146,6 +147,9 @@ TYPED_TEST(RecurseVisitorTests, TestFullRecurse) {
       {{"hybridStruct", "childMap"}, testDyn["hybridStruct"]["childMap"]},
       {{"hybridStruct", "strMap"}, testDyn["hybridStruct"]["strMap"]},
       {{"hybridStruct", "structMap"}, testDyn["hybridStruct"]["structMap"]},
+      {{"hybridStruct", "leafI32"}, testDyn["hybridStruct"]["leafI32"]},
+      {{"hybridStruct", "listOfStruct"},
+       testDyn["hybridStruct"]["listOfStruct"]},
       {{"mapOfEnumToStruct"}, testDyn["mapOfEnumToStruct"]},
       {{"mapOfEnumToStruct", "3"}, testDyn["mapOfEnumToStruct"][3]},
       {{"mapOfEnumToStruct", "3", "min"},
@@ -166,6 +170,10 @@ TYPED_TEST(RecurseVisitorTests, TestFullRecurse) {
   }
 
   EXPECT_EQ(visited.size(), expected.size());
+  for (auto& [path, dyn] : visited) {
+    EXPECT_EQ(dyn, visited[path])
+        << "Path /" << folly::join('/', path) << " does not match visited";
+  }
   for (auto& [path, dyn] : expected) {
     EXPECT_EQ(dyn, visited[path])
         << "Path /" << folly::join('/', path) << " does not match expected";
@@ -209,7 +217,8 @@ TYPED_TEST(RecurseVisitorTests, TestLeafRecurse) {
       {{"mapOfEnumToStruct", "3", "max"},
        testDyn["mapOfEnumToStruct"][3]["max"]},
       {{"mapOfEnumToStruct", "3", "invert"},
-       testDyn["mapOfEnumToStruct"][3]["invert"]}};
+       testDyn["mapOfEnumToStruct"][3]["invert"]},
+      {{"hybridStruct", "leafI32"}, testDyn["hybridStruct"]["leafI32"]}};
 
   std::map<std::vector<std::string>, folly::dynamic> hybridNodes = {
       {{"mapOfEnumToStruct", "3"}, testDyn["mapOfEnumToStruct"][3]},
@@ -228,6 +237,10 @@ TYPED_TEST(RecurseVisitorTests, TestLeafRecurse) {
   }
 
   EXPECT_EQ(visited.size(), expected.size());
+  for (auto& [path, dyn] : visited) {
+    EXPECT_EQ(dyn, expected[path])
+        << "Path /" << folly::join('/', path) << " does not match visited";
+  }
   for (auto& [path, dyn] : expected) {
     EXPECT_EQ(dyn, visited[path])
         << "Path /" << folly::join('/', path) << " does not match expected";
@@ -254,7 +267,8 @@ TYPED_TEST(RecurseVisitorTests, TestLeafRecurse) {
   hybridDeepLeaves = {
       {{"15", "3", "1"}, testDyn["mapOfEnumToStruct"][3]["min"]},
       {{"15", "3", "2"}, testDyn["mapOfEnumToStruct"][3]["max"]},
-      {{"15", "3", "3"}, testDyn["mapOfEnumToStruct"][3]["invert"]}};
+      {{"15", "3", "3"}, testDyn["mapOfEnumToStruct"][3]["invert"]},
+      {{"31", "5"}, testDyn["hybridStruct"]["leafI32"]}};
 
   hybridNodes = {
       {{"15", "3"}, testDyn["mapOfEnumToStruct"][3]},
@@ -273,6 +287,10 @@ TYPED_TEST(RecurseVisitorTests, TestLeafRecurse) {
   }
 
   EXPECT_EQ(visited.size(), expected.size());
+  for (auto& [path, dyn] : visited) {
+    EXPECT_EQ(dyn, expected[path])
+        << "Path /" << folly::join('/', path) << " does not match visited";
+  }
   for (auto& [path, dyn] : expected) {
     EXPECT_EQ(dyn, visited[path])
         << "Path /" << folly::join('/', path) << " does not match expected";
diff --git a/fboss/thrift_cow/visitors/tests/VisitorTestUtils.cpp b/fboss/thrift_cow/visitors/tests/VisitorTestUtils.cpp
index 08b6db853d1b9..0dda4da759ae8 100644
--- a/fboss/thrift_cow/visitors/tests/VisitorTestUtils.cpp
+++ b/fboss/thrift_cow/visitors/tests/VisitorTestUtils.cpp
@@ -18,11 +18,17 @@ TestStruct createSimpleTestStruct() {
       "cowMap", dynamic::object(1, true))(
       "hybridMap", dynamic::object(1, true))(
       "hybridMapOfI32ToStruct",
-      dynamic::object(20, dynamic::object("min", 400)("max", 600)))(
+      dynamic::object(
+          20,
+          dynamic::object("childMap", dynamic::object())("leafI32", 0)(
+              "listOfStruct", dynamic::array())("strMap", dynamic::object())(
+              "structMap", dynamic::object())))(
       "hybridMapOfMap", dynamic::object(10, dynamic::object(20, 30)))(
       "hybridStruct",
       dynamic::object(
-          "childMap", dynamic::object(10, true)(20, false)(50, false)))(
+          "childMap", dynamic::object(10, true)(20, false)(50, false))(
+          "leafI32", 0)("listOfStruct", dynamic::array())(
+          "strMap", dynamic::object())("structMap", dynamic::object()))(
       "mapOfStringToI32", dynamic::object("test1", 1)("test2", 2))(
       "mapOfI32ToStruct",
       dynamic::object(20, dynamic::object("min", 400)("max", 600)))(