diff --git a/src/Analyzer/QueryTreeBuilder.cpp b/src/Analyzer/QueryTreeBuilder.cpp
index 0d44cf76462..a45702cf5b0 100644
--- a/src/Analyzer/QueryTreeBuilder.cpp
+++ b/src/Analyzer/QueryTreeBuilder.cpp
@@ -1104,8 +1104,6 @@ QueryTreeNodePtr QueryTreeBuilder::setFirstArgumentAsParameter(const ASTFunction
             "If groupConcat is used with two arguments, the first argument must be a constant String");
     }
 
-    std::string separator = first_arg_literal->value.safeGet<String>();
-
     ASTPtr second_arg = function->arguments->children[1]->clone();
 
     auto function_node = std::make_shared<FunctionNode>(function->name);
diff --git a/tests/queries/0_stateless/03156_group_concat.reference b/tests/queries/0_stateless/03156_group_concat.reference
index 6f4b84fbc1d..8bf47211a1d 100644
--- a/tests/queries/0_stateless/03156_group_concat.reference
+++ b/tests/queries/0_stateless/03156_group_concat.reference
@@ -22,4 +22,6 @@ abc.a.makson95
 [1,2,3]/[993,986,979,972]/[]
 [1,2,3]/[993,986,979,972]/[]
 [1,2,3]/[993,986,979,972]/[]
+[1,2,3]/[993,986,979,972]/[]
+[1,2,3]/[993,986,979,972]/[]
 488890
diff --git a/tests/queries/0_stateless/03156_group_concat.sql b/tests/queries/0_stateless/03156_group_concat.sql
index 719d271f4b5..eee71d9490f 100644
--- a/tests/queries/0_stateless/03156_group_concat.sql
+++ b/tests/queries/0_stateless/03156_group_concat.sql
@@ -48,12 +48,14 @@ TRUNCATE TABLE test_groupConcat;
 
 INSERT INTO test_groupConcat VALUES (0, 95, 'abc', [1, 2, 3]), (1, NULL, 'a', [993, 986, 979, 972]), (2, 123, 'makson95', []);
 
-SELECT groupConcat(',', p_int) FROM test_groupConcat;
-SELECT groupConcat('.')(p_string) FROM test_groupConcat;
-SELECT groupConcat('/', p_array) FROM test_groupConcat;
+SELECT groupConcat(',', p_int) FROM test_groupConcat SETTINGS enable_analyzer=1;
+SELECT groupConcat('.')(p_string) FROM test_groupConcat SETTINGS enable_analyzer=1;
+SELECT groupConcat('/', p_array) FROM test_groupConcat SETTINGS enable_analyzer=1;
 
-SELECT group_concat('/', p_array) FROM test_groupConcat;
-SELECT grouP_CONcat('/', p_array) FROM test_groupConcat;
+SELECT group_concat('/', p_array) FROM test_groupConcat SETTINGS enable_analyzer=1;
+SELECT grouP_CONcat('/', p_array) FROM test_groupConcat SETTINGS enable_analyzer=1;
+SELECT grouP_CONcat(',')('/', p_array) FROM test_groupConcat SETTINGS enable_analyzer=1; -- overrides current parameter
+SELECT grouP_CONcat(',', 2)('/', p_array) FROM test_groupConcat SETTINGS enable_analyzer=1; -- works fine with both arguments
 
 DROP TABLE IF EXISTS test_groupConcat;