diff --git a/t/includes/one.json b/t/includes/one.json
new file mode 100644
index 0000000..955c956
--- /dev/null
+++ b/t/includes/one.json
@@ -0,0 +1,3 @@
+{
+  "Fn::Include": "./$FILE_NAME.json"
+}
diff --git a/t/includes/two.json b/t/includes/two.json
new file mode 100644
index 0000000..c8c4105
--- /dev/null
+++ b/t/includes/two.json
@@ -0,0 +1,3 @@
+{
+  "foo": "bar"
+}
diff --git a/t/tests/cli.json b/t/tests/cli.json
index 43f5040..a076aa6 100644
--- a/t/tests/cli.json
+++ b/t/tests/cli.json
@@ -116,6 +116,17 @@
       "exitCode": 1,
       "errorMessage": "missed comma"
     },
+    {
+      "name": "dynamic filename via env var",
+      "template": "t/includes/one.json",
+      "args": ["--enable", "eval,env"],
+      "env": {
+        "FILE_NAME": "two"
+      },
+      "output": {
+        "foo": "bar"
+      }
+    },
     {
       "name": "ifEval",
       "env": {
diff --git a/t/tests/location.json b/t/tests/location.json
index 40abeea..3b6cf47 100644
--- a/t/tests/location.json
+++ b/t/tests/location.json
@@ -129,6 +129,17 @@
       "Mappings": null
     }
   },
+  {
+    "name": "dynamic filename via env var ($FILE_NAME)",
+    "doEnv": true,
+    "inject": { "FILE_NAME": "two" },
+    "template": {
+      "Fn::Include": "includes/one.json"
+    },
+    "output": {
+      "foo": "bar"
+    }
+  },
   {
     "name": "deep nested w/ query dev",
     "doEnv": true,