diff --git a/radio/tests/interpolation/farrow/test.cpp b/radio/tests/interpolation/farrow/test.cpp
index c5748d2..9de383b 100644
--- a/radio/tests/interpolation/farrow/test.cpp
+++ b/radio/tests/interpolation/farrow/test.cpp
@@ -98,6 +98,8 @@ class TimingGeneratorGardner : public Interpolation::TimingGenerator
 	{
 		LeadLagInit(&loop_filter_str, 1.0);
 		LeadLagSetCoeff(&str_loopfilter_coeff, STR_GAIN_LEAD_AQU, STR_GAIN_LAG_AQU);
+		STRGardnerInit(&m_SymbolTimingRevovery);
+		m_SymbolTimingRevovery.alternate_impl = 1;
 	}
 
 	void setOmega(radio_float_t omega)