diff --git a/modules/ts/include/opencv2/ts/ts_perf.hpp b/modules/ts/include/opencv2/ts/ts_perf.hpp
index 3f64fdcc41c7ba0c4cd419393a00f5a4c4d3ee56..5f8a816b64da9e2b7dbe65e563b7935917fd118a 100644
--- a/modules/ts/include/opencv2/ts/ts_perf.hpp
+++ b/modules/ts/include/opencv2/ts/ts_perf.hpp
@@ -287,7 +287,7 @@ private:
 
         _declareHelper& iterations(int n);
         _declareHelper& time(double timeLimitSecs);
-        _declareHelper& tbb_threads(int n);
+        _declareHelper& tbb_threads(int n = -1);
     private:
         TestBase* test;
         _declareHelper(TestBase* t);
diff --git a/modules/ts/src/ts_perf.cpp b/modules/ts/src/ts_perf.cpp
index 5c1812b151c25ba175a53aaa35ee8a2a64bca963..b55a347f272af8f2dbd2dc0cda33a38ac9a1103f 100644
--- a/modules/ts/src/ts_perf.cpp
+++ b/modules/ts/src/ts_perf.cpp
@@ -898,10 +898,9 @@ TestBase::_declareHelper& TestBase::_declareHelper::time(double timeLimitSecs)
 TestBase::_declareHelper& TestBase::_declareHelper::tbb_threads(int n)
 {
 #ifdef HAVE_TBB
-    if (n > 0) {
-        test->p_tbb_initializer.release();
+    test->p_tbb_initializer.release();
+    if (n > 0)
         test->p_tbb_initializer=new tbb::task_scheduler_init(n);
-    }
 #endif
     return *this;
 }