1 files changed, 31 insertions, 0 deletions
diff --git a/testsuite/synth/issue937/tb_enot.vhdl b/testsuite/synth/issue937/tb_enot.vhdl
new file mode 100644
index 000000000..850a4b376
--- /dev/null
+++ b/testsuite/synth/issue937/tb_enot.vhdl
@@ -0,0 +1,31 @@
+entity tb_enot is
+end tb_enot;
+
+architecture behav of tb_enot is
+  signal i : bit;
+  signal x : boolean;
+  signal o : bit;
+begin
+  dut: entity work.enot
+    port map (i, x, o);
+
+  process
+  begin
+    i <= '0';
+    x <= false;
+    wait for 1 ns;
+    assert o = '0' severity failure;
+
+    i <= '1';
+    x <= false;
+    wait for 1 ns;
+    assert o = '1' severity failure;
+
+    i <= '1';
+    x <= True;
+    wait for 1 ns;
+    assert o = '0' severity failure;
+
+    wait;
+  end process;
+end behav;