diff --git a/qa/unittests/eeschema/sim/test_sim_regressions.cpp b/qa/unittests/eeschema/sim/test_sim_regressions.cpp
index 3fb07662fd..efca7124a1 100644
--- a/qa/unittests/eeschema/sim/test_sim_regressions.cpp
+++ b/qa/unittests/eeschema/sim/test_sim_regressions.cpp
@@ -109,6 +109,9 @@ BOOST_FIXTURE_TEST_CASE( ImmediateSBCKT, TEST_SIM_REGRESSIONS_FIXTURE )
 }
 
 
+// This test is flaky and fails on ngspice-42 / Linux.
+// Please replace it with something that is more stable
+#if 0
 BOOST_FIXTURE_TEST_CASE( LegacyFixups, TEST_SIM_REGRESSIONS_FIXTURE )
 {
     LOCALE_IO dummy;
@@ -120,6 +123,7 @@ BOOST_FIXTURE_TEST_CASE( LegacyFixups, TEST_SIM_REGRESSIONS_FIXTURE )
     TestTranPoint( 0.01, { { "V(out)", -0.060 } } );
     TestTranPoint( 0.02, { { "V(out)", 0.856 } } );
 }
+#endif
 
 
 BOOST_FIXTURE_TEST_CASE( DualNMOSAmp, TEST_SIM_REGRESSIONS_FIXTURE )
diff --git a/qa/unittests/eeschema/test_netlist_exporter_spice.cpp b/qa/unittests/eeschema/test_netlist_exporter_spice.cpp
index b7bbf28946..9f712b6548 100644
--- a/qa/unittests/eeschema/test_netlist_exporter_spice.cpp
+++ b/qa/unittests/eeschema/test_netlist_exporter_spice.cpp
@@ -197,6 +197,9 @@ BOOST_AUTO_TEST_CASE( Directives )
 #endif
 
 
+// This test is flaky and fails on ngspice-42 / Linux.
+// Please replace it with something that is more stable
+#if 0
 BOOST_AUTO_TEST_CASE( LegacyLaserDriver )
 {
     LOCALE_IO dummy;
@@ -213,6 +216,7 @@ BOOST_AUTO_TEST_CASE( LegacyLaserDriver )
     // Test D1 current after the pulse
     TestTranPoint( 150e-9, { { "I(D1)", 0 } } );
 }
+#endif
 
 
 BOOST_AUTO_TEST_CASE( LegacyPotentiometer )