diff --git a/test/testsymboldatabase.cpp b/test/testsymboldatabase.cpp
index 48f4c2af4..2902a715e 100644
--- a/test/testsymboldatabase.cpp
+++ b/test/testsymboldatabase.cpp
@@ -227,6 +227,7 @@ private:
         TEST_CASE(symboldatabase43); // #4738
         TEST_CASE(symboldatabase44);
         TEST_CASE(symboldatabase45); // #6125
+        TEST_CASE(symboldatabase46); // #6171 (anonymous namespace)
 
         TEST_CASE(isImplicitlyVirtual);
 
@@ -1983,6 +1984,27 @@ private:
         ASSERT_EQUALS(Scope::eFunction, scope->type);
     }
 
+    void symboldatabase46() { // #6171 (anonymous namespace)
+        GET_SYMBOL_DB("struct S { };\n"
+                      "namespace {\n"
+                      "    struct S { };\n"
+                      "}");
+
+        ASSERT(db != nullptr);
+        ASSERT_EQUALS(4U, db->scopeList.size());
+        std::list<Scope>::const_iterator scope = db->scopeList.begin();
+        ASSERT_EQUALS(Scope::eGlobal, scope->type);
+        ++scope;
+        ASSERT_EQUALS(Scope::eStruct, scope->type);
+        ASSERT_EQUALS(scope->className, "S");
+        ++scope;
+        ASSERT_EQUALS(Scope::eNamespace, scope->type);
+        ASSERT_EQUALS(scope->className, "");
+        ++scope;
+        ASSERT_EQUALS(Scope::eStruct, scope->type);
+        ASSERT_EQUALS(scope->className, "S");
+    }
+
     void isImplicitlyVirtual() {
         {
             GET_SYMBOL_DB("class Base {\n"