diff --git a/src/pkg/runtime/runtime_test.go b/src/pkg/runtime/runtime_test.go
index 83489480da6..9aca68e1a12 100644
--- a/src/pkg/runtime/runtime_test.go
+++ b/src/pkg/runtime/runtime_test.go
@@ -135,6 +135,12 @@ func TestStopCPUProfilingWithProfilerOff(t *testing.T) {
 }
 
 func TestSetPanicOnFault(t *testing.T) {
+	// This currently results in a fault in the signal trampoline on
+	// dragonfly/386 - see issue 7421.
+	if GOOS == "dragonfly" && GOARCH == "386" {
+		t.Skip("skipping test on dragonfly/386")
+	}
+
 	old := debug.SetPanicOnFault(true)
 	defer debug.SetPanicOnFault(old)