diff --git a/tests/tc021/expected.txt b/tests/tc021/expected.txt
new file mode 100644
index 0000000..5ca5907
--- /dev/null
+++ b/tests/tc021/expected.txt
@@ -0,0 +1,5 @@
+identifiers
+idouble	k
+ifloat	k
+int	k
+ireal	k
diff --git a/tests/tc021/file.d b/tests/tc021/file.d
new file mode 100644
index 0000000..0ddf2ba
--- /dev/null
+++ b/tests/tc021/file.d
@@ -0,0 +1 @@
+i
diff --git a/tests/tc021/run.sh b/tests/tc021/run.sh
new file mode 100755
index 0000000..03fe27b
--- /dev/null
+++ b/tests/tc021/run.sh
@@ -0,0 +1,5 @@
+set -e
+set -u
+
+../../bin/dcd-client file.d -c1 > actual.txt
+diff actual.txt expected.txt