6 files changed, 14 insertions, 3 deletions
diff --git a/cli/tests/integration/check_tests.rs b/cli/tests/integration/check_tests.rs
index 1273fbdce..f2fe882eb 100644
--- a/cli/tests/integration/check_tests.rs
+++ b/cli/tests/integration/check_tests.rs
@@ -232,6 +232,12 @@ fn ts_no_recheck_on_redirect() {
   assert!(std::str::from_utf8(&output.stderr).unwrap().is_empty());
 }
 
+itest!(check_dts {
+  args: "check --quiet check/check_dts.d.ts",
+  output: "check/check_dts.out",
+  exit_code: 1,
+});
+
 itest!(package_json_basic {
   args: "check main.ts",
   output: "package_json/basic/main.check.out",
diff --git a/cli/tests/integration/lsp_tests.rs b/cli/tests/integration/lsp_tests.rs
index bca327e96..9a62e42a3 100644
--- a/cli/tests/integration/lsp_tests.rs
+++ b/cli/tests/integration/lsp_tests.rs
@@ -1021,7 +1021,7 @@ fn lsp_hover() {
           "language": "typescript",
           "value": "const Deno.args: string[]"
         },
-        "Returns the script arguments to the program.\n\nGive the following command line invocation of Deno:\n\n```sh\ndeno run --allow-read https://deno.land/std/examples/cat.ts /etc/passwd\n```\n\nThen `Deno.args` will contain:\n\n```\n[ \"/etc/passwd\" ]\n```\n\nIf you are looking for a structured way to parse arguments, there is the\n[`std/flags`](https://deno.land/std/flags) module as part of the Deno\nstandard library.",
+        "Returns the script arguments to the program.\n\nGive the following command line invocation of Deno:\n\n```sh\ndeno run --allow-read https://deno.land/std/examples/cat.ts /etc/passwd\n```\n\nThen `Deno.args` will contain:\n\n```ts\n[ \"/etc/passwd\" ]\n```\n\nIf you are looking for a structured way to parse arguments, there is the\n[`std/flags`](https://deno.land/std/flags) module as part of the Deno\nstandard library.",
         "\n\n*@category* - Runtime Environment",
       ],
       "range": {
diff --git a/cli/tests/testdata/check/check_dts.d.ts b/cli/tests/testdata/check/check_dts.d.ts
new file mode 100644
index 000000000..9cf60f063
--- /dev/null
+++ b/cli/tests/testdata/check/check_dts.d.ts
@@ -0,0 +1,2 @@
+// TS1039 [ERROR]: Initializers are not allowed in ambient contexts.
+export const a: string = Deno.version.deno;
diff --git a/cli/tests/testdata/check/check_dts.out b/cli/tests/testdata/check/check_dts.out
new file mode 100644
index 000000000..e7ff9a009
--- /dev/null
+++ b/cli/tests/testdata/check/check_dts.out
@@ -0,0 +1,4 @@
+error: TS1039 [ERROR]: Initializers are not allowed in ambient contexts.
+export const a: string = Deno.version.deno;
+                         ~~~~~~~~~~~~~~~~~
+    at file:///[WILDCARD]/check_dts.d.ts:2:26
diff --git a/cli/tests/testdata/test/doc.out b/cli/tests/testdata/test/doc.out
index 1766912e5..cd8bbb620 100644
--- a/cli/tests/testdata/test/doc.out
+++ b/cli/tests/testdata/test/doc.out
@@ -1,4 +1,3 @@
-Check [WILDCARD]/doc.ts$2-5.ts
 Check [WILDCARD]/doc.ts$6-9.js
 Check [WILDCARD]/doc.ts$10-13.jsx
 Check [WILDCARD]/doc.ts$14-17.ts
diff --git a/cli/tests/testdata/test/doc.ts b/cli/tests/testdata/test/doc.ts
index 52fe6bdf0..519479fc5 100644
--- a/cli/tests/testdata/test/doc.ts
+++ b/cli/tests/testdata/test/doc.ts
@@ -27,7 +27,7 @@
  */
 
 /**
- * ```
+ * ```ts
  * import { check } from "./doc.ts";
  *
  * console.assert(check() == 42);