diff --git a/tests/progbar.cpp b/tests/progbar.cpp
index fdce8c03d..47e8bed23 100644
--- a/tests/progbar.cpp
+++ b/tests/progbar.cpp
@@ -11,7 +11,35 @@ TEST_CASE("ProgressBar") {
   REQUIRE(n_);
   REQUIRE(0 == ncplane_cursor_move_yx(n_, 0, 0));
 
-  // FIXME add tests
+  // a single-cell progress bar progressing from bottom to top in 1/8 chunks
+  SUBCASE("SingleCellUp") {
+    struct ncplane_options nopts = {
+      .y = 0,
+      .x = 0,
+      .rows = 1,
+      .cols = 1,
+      .userptr = nullptr,
+      .name = "pbar",
+      .resizecb = nullptr,
+      .flags = 0,
+    };
+    const char* egcs[] = { " ", "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█" };
+    auto n = ncplane_create(n_, &nopts);
+    REQUIRE(nullptr != n);
+    auto pbar = ncprogbar_create(n, NULL);
+    for(int i = 0 ; i < 9 ; ++i){
+      double p = i / 8.0;
+      CHECK(0 == ncprogbar_set_progress(pbar, p));
+      CHECK(0 == notcurses_render(nc_));
+      uint16_t smask;
+      uint64_t channels;
+      char* egc = notcurses_at_yx(nc_, 0, 0, &smask, &channels);
+      REQUIRE(nullptr != egc);
+      CHECK(0 == strcmp(egc, egcs[i]));
+      free(egc);
+    }
+    ncprogbar_destroy(pbar);
+  }
   
   CHECK(0 == notcurses_stop(nc_));
 }