diff --git a/tests/abi/config/default.cpp b/tests/abi/config/default.cpp
index a87244e249..f210ae95a8 100644
--- a/tests/abi/config/default.cpp
+++ b/tests/abi/config/default.cpp
@@ -24,6 +24,10 @@ TEST_CASE("default namespace")
         expected += "_diag";
 #endif
 
+#if JSON_DIAGNOSTIC_POSITIONS
+        expected += "_dp";
+#endif
+
 #if JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON
         expected += "_ldvcmp";
 #endif
diff --git a/tests/abi/config/noversion.cpp b/tests/abi/config/noversion.cpp
index 0bfe71ba2f..c76ec11b65 100644
--- a/tests/abi/config/noversion.cpp
+++ b/tests/abi/config/noversion.cpp
@@ -25,6 +25,10 @@ TEST_CASE("default namespace without version component")
         expected += "_diag";
 #endif
 
+#if JSON_DIAGNOSTIC_POSITIONS
+        expected += "_dp";
+#endif
+
 #if JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON
         expected += "_ldvcmp";
 #endif