+test_begin_subtest "sanity check zero values"
+$TEST_DIRECTORY/arg-test --keyword=zero --boolean=false --int=0 > OUTPUT
+cat <<EOF > EXPECTED
+boolean 0
+keyword 0
+int 0
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "space instead of = between parameter name and value"
+# Note: spaces aren't allowed for booleans. false turns into a positional arg!
+$TEST_DIRECTORY/arg-test --keyword one --boolean false --string foo --int 7 --flag one --flag three > OUTPUT
+cat <<EOF > EXPECTED
+boolean 1
+keyword 1
+flags 5
+int 7
+string foo
+positional arg 1 false
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+