diff --git a/tests/ts/ts010033.pp b/tests/ts/ts010033.pp
new file mode 100644
index 0000000000..4026cad370
--- /dev/null
+++ b/tests/ts/ts010033.pp
@@ -0,0 +1,76 @@
+{$OPT -Or}
+{ test for full boolean eval and register usage with b+ }
+
+{$b+}
+
+var
+  funcscalled: byte;
+  ok: boolean;
+
+function function1: boolean;
+begin
+  writeln('function1 called!');
+  inc(funcscalled);
+  function1 := false;
+end;
+
+function function2: boolean;
+begin
+  writeln('function2 called!');
+  inc(funcscalled);
+  function2 := false;
+end;
+
+function function3: boolean;
+begin
+  writeln('function3 called!');
+  inc(funcscalled);
+  function3 := false;
+end;
+
+function function4: boolean;
+begin
+  writeln('function4 called!');
+  inc(funcscalled);
+  function4 := false;
+end;
+
+function test2: boolean;
+var j, k, l, m: longint;
+begin
+  test2 := true;
+  m := 0;
+{ get as much regvars occupied as possible }
+  for j := 1 to 1000 do
+    for k := 1 to 100 do
+      for l := k downto 0 do
+         inc(m,j - k + l);
+  if (j = 5) and (k = 0) and (l = 100) and function1 then
+    begin
+      test2 := false;
+      writeln('bug');
+    end;
+end;
+
+begin
+  ok := true;
+  funcscalled := 0;
+  if function1 and function2 and function3 and function4 then
+    begin
+      writeln('bug!');
+    end;
+  ok := funcscalled = 4;
+  if ok then
+    writeln('all functions called!')
+  else
+    writeln('not all functions called');
+  ok := test2 and (funcscalled = 5);
+  if ok then
+    writeln('test2 passed')
+  else writeln('test2 not passed');
+  if not ok then
+    begin
+      writeln('full boolean evaluation is not working!');
+      halt(1);
+    end;
+end.