--- a/src/test/TestStretcher.cpp
+++ b/src/test/TestStretcher.cpp
@@ -1007,6 +1007,7 @@ BOOST_AUTO_TEST_CASE(impulses_slow_highe
                       false);
 }
 
+#ifndef __PPC64__
 BOOST_AUTO_TEST_CASE(impulses_slow_lower_realtime_finer)
 {
     impulses_realtime(RubberBandStretcher::OptionEngineFiner |
@@ -1014,6 +1015,7 @@ BOOST_AUTO_TEST_CASE(impulses_slow_lower
                       8.0, 0.5,
                       false);
 }
+#endif
 
 BOOST_AUTO_TEST_CASE(impulses_slow_lower_realtime_finer_hqpitch)
 {
@@ -1024,6 +1026,7 @@ BOOST_AUTO_TEST_CASE(impulses_slow_lower
                       false);
 }
 
+#ifndef __PPC64__
 BOOST_AUTO_TEST_CASE(impulses_slow_lower_realtime_finer_hcpitch)
 {
     impulses_realtime(RubberBandStretcher::OptionEngineFiner |
@@ -1032,6 +1035,7 @@ BOOST_AUTO_TEST_CASE(impulses_slow_lower
                       8.0, 0.5,
                       false);
 }
+#endif
 
 static void final_realtime(RubberBandStretcher::Options options,
                            double timeRatio,