diff --git a/src/input/keyplot.cpp b/src/input/keyplot.cpp
index 7422ba528..c52c12413 100644
--- a/src/input/keyplot.cpp
+++ b/src/input/keyplot.cpp
@@ -11,6 +11,8 @@ int main(void){
   }
   std::unique_ptr<ncpp::Plane> n(nc.get_stdplane ());
   struct ncplot_options popts{};
+  popts.rangex = 60;
+  popts.detectrange = true;
   struct ncplot* plot = ncplot_create(*n, &popts);
   char32_t r;
   ncinput ni;
diff --git a/tests/plot.cpp b/tests/plot.cpp
index 2e5a68b1d..a985d3939 100644
--- a/tests/plot.cpp
+++ b/tests/plot.cpp
@@ -20,6 +20,28 @@ TEST_CASE("Plot") {
   REQUIRE(n_);
   REQUIRE(0 == ncplane_cursor_move_yx(n_, 0, 0));
 
+  // setting detectrange with non-zero domain limits is invalid
+  SUBCASE("DetectRangeBadY"){
+    ncplot_options popts{};
+    popts.detectrange = true;
+    popts.miny = -1;
+    ncplot* p = ncplot_create(n_, &popts);
+    CHECK(nullptr == p);
+    popts.miny = 0;
+    popts.maxy = 1;
+    ncplot* p = ncplot_create(n_, &popts);
+    CHECK(nullptr == p);
+  }
+
+  // maxy < miny is invalid
+  SUBCASE("RejectMaxyLessMiny"){
+    ncplot_options popts{};
+    popts.miny = 2;
+    popts.maxy = 1;
+    ncplot* p = ncplot_create(n_, &popts);
+    CHECK(nullptr == p);
+  }
+
   SUBCASE("SimplePlot"){
     ncplot_options popts{};
     ncplot* p = ncplot_create(n_, &popts);