diff --git a/tools/diff-so-fancy/diff_so_fancy.test.ts b/tools/diff-so-fancy/diff_so_fancy.test.ts
new file mode 100644
index 000000000..eafc51d19
--- /dev/null
+++ b/tools/diff-so-fancy/diff_so_fancy.test.ts
@@ -0,0 +1,6 @@
+import { toolInstallTest } from "tests";
+
+toolInstallTest({
+  toolName: "diff-so-fancy",
+  toolVersion: "1.4.3",
+});
diff --git a/tools/diff-so-fancy/plugin.yaml b/tools/diff-so-fancy/plugin.yaml
new file mode 100644
index 000000000..f45c10476
--- /dev/null
+++ b/tools/diff-so-fancy/plugin.yaml
@@ -0,0 +1,9 @@
+version: 0.1
+tools:
+  definitions:
+    - name: diff-so-fancy
+      runtime: node
+      package: diff-so-fancy
+      known_good_version: 1.4.3
+      # NOTE: shim may differ from tool name
+      shims: [diff-so-fancy]