diff --git a/ql/test/library-tests/semmle/go/dataflow/FunctionInputsAndOutputs/FunctionOutput_isResult.expected b/ql/test/library-tests/semmle/go/dataflow/FunctionInputsAndOutputs/FunctionOutput_isResult.expected
new file mode 100644
index 00000000000..7f903e4efed
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/dataflow/FunctionInputsAndOutputs/FunctionOutput_isResult.expected
@@ -0,0 +1,4 @@
+| main.go:51:2:51:14 | call to op | main.go:51:2:51:14 | call to op | result |
+| main.go:53:2:53:22 | call to op2 | main.go:53:2:53:22 | call to op2 | result |
+| main.go:53:14:53:21 | call to bump | main.go:53:14:53:21 | call to bump | result |
+| tst.go:9:17:9:33 | call to new | tst.go:9:17:9:33 | call to new | result |
diff --git a/ql/test/library-tests/semmle/go/dataflow/FunctionInputsAndOutputs/FunctionOutput_isResult.ql b/ql/test/library-tests/semmle/go/dataflow/FunctionInputsAndOutputs/FunctionOutput_isResult.ql
new file mode 100644
index 00000000000..c39c80da64e
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/dataflow/FunctionInputsAndOutputs/FunctionOutput_isResult.ql
@@ -0,0 +1,5 @@
+import go
+
+from FunctionOutput outp, DataFlow::CallNode c, DataFlow::Node nodeTo
+where outp.isResult() and nodeTo = outp.getNode(c)
+select c, nodeTo, outp
diff --git a/ql/test/library-tests/semmle/go/dataflow/FunctionInputsAndOutputs/FunctionOutput_isResult_int.expected b/ql/test/library-tests/semmle/go/dataflow/FunctionInputsAndOutputs/FunctionOutput_isResult_int.expected
new file mode 100644
index 00000000000..f36f1b8a84b
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/dataflow/FunctionInputsAndOutputs/FunctionOutput_isResult_int.expected
@@ -0,0 +1,4 @@
+| main.go:54:10:54:15 | call to test | main.go:54:2:54:15 | ... := ...[0] | 0 | result 0 |
+| main.go:54:10:54:15 | call to test | main.go:54:2:54:15 | ... := ...[1] | 1 | result 1 |
+| main.go:56:9:56:15 | call to test2 | main.go:56:2:56:15 | ... = ...[0] | 0 | result 0 |
+| main.go:56:9:56:15 | call to test2 | main.go:56:2:56:15 | ... = ...[1] | 1 | result 1 |
diff --git a/ql/test/library-tests/semmle/go/dataflow/FunctionInputsAndOutputs/FunctionOutput_isResult_int.ql b/ql/test/library-tests/semmle/go/dataflow/FunctionInputsAndOutputs/FunctionOutput_isResult_int.ql
new file mode 100644
index 00000000000..8d5e142cfbb
--- /dev/null
+++ b/ql/test/library-tests/semmle/go/dataflow/FunctionInputsAndOutputs/FunctionOutput_isResult_int.ql
@@ -0,0 +1,5 @@
+import go
+
+from FunctionOutput outp, int i, DataFlow::CallNode c, DataFlow::Node nodeTo
+where outp.isResult(i) and nodeTo = outp.getNode(c)
+select c, nodeTo, i, outp