diff --git a/tests/ilowpass/low-gain/README b/tests/ilowpass/low-gain/README
new file mode 100644
index 00000000000..7bc24878cdc
--- /dev/null
+++ b/tests/ilowpass/low-gain/README
@@ -0,0 +1,2 @@
+Test that ilowpass's output gets all the way to its target, even with
+low gain.
diff --git a/tests/ilowpass/low-gain/expected b/tests/ilowpass/low-gain/expected
new file mode 100644
index 00000000000..b5ff9099284
--- /dev/null
+++ b/tests/ilowpass/low-gain/expected
@@ -0,0 +1,3 @@
+4
+0
+-5
diff --git a/tests/ilowpass/low-gain/test.hal b/tests/ilowpass/low-gain/test.hal
new file mode 100644
index 00000000000..633c28c48d2
--- /dev/null
+++ b/tests/ilowpass/low-gain/test.hal
@@ -0,0 +1,20 @@
+loadrt threads
+loadrt ilowpass
+addf ilowpass.0 thread1
+
+setp ilowpass.0.scale 1
+setp ilowpass.0.gain 0.1
+
+start
+
+setp ilowpass.0.in 4
+loadusr -w sleep 1
+getp ilowpass.0.out
+
+setp ilowpass.0.in 0
+loadusr -w sleep 1
+getp ilowpass.0.out
+
+setp ilowpass.0.in -5
+loadusr -w sleep 1
+getp ilowpass.0.out