diff --git a/tested/languages/typescript/config.py b/tested/languages/typescript/config.py
index abf8fb1d..ee746073 100644
--- a/tested/languages/typescript/config.py
+++ b/tested/languages/typescript/config.py
@@ -138,12 +138,11 @@ def modify_solution(self, solution: Path):
             solution.parent,
             timeout=None,
             command=["tsx", parse_file, str(solution.absolute())],
-            check=True,
+            check=False,
         )
         assert output, "Missing output from TypesScript's modify_solution"
         namings = output.stdout.strip()
         with open(solution, "a") as file:
-            # print(f"\ndeclare var module: any;", file=file)
             print(f"\nexport {{{namings}}};", file=file)
 
         # Add strict mode to the script.
diff --git a/tested/languages/typescript/generators.py b/tested/languages/typescript/generators.py
index c93a8923..20a462b9 100644
--- a/tested/languages/typescript/generators.py
+++ b/tested/languages/typescript/generators.py
@@ -160,7 +160,7 @@ def _generate_internal_context(ctx: PreparedContext, pu: PreparedExecutionUnit)
     if not ctx.context.has_main_testcase():
         result += f"""
             writeSeparator();
-            //delete require.cache[require.resolve("./{submission_file(pu.language)}")];
+            delete require.cache[require.resolve("./{submission_file(pu.language)}")];
             let {pu.submission_name} = await import('./{submission_file(pu.language)}');
             """
 
@@ -192,7 +192,7 @@ def _generate_internal_context(ctx: PreparedContext, pu: PreparedExecutionUnit)
         if tc.testcase.is_main_testcase():
             assert isinstance(tc.input, MainInput)
             result += f"""
-                //delete require.cache[require.resolve("./{pu.submission_name}.ts")];
+                delete require.cache[require.resolve("./{pu.submission_name}.ts")];
                 let {pu.submission_name} = await import('./{pu.submission_name}.ts');
             """
         else:
diff --git a/tests/exercises/echo-function-additional-source-files/solution/correct.ts b/tests/exercises/echo-function-additional-source-files/solution/correct.ts
index cd443043..7d4a970d 100644
--- a/tests/exercises/echo-function-additional-source-files/solution/correct.ts
+++ b/tests/exercises/echo-function-additional-source-files/solution/correct.ts
@@ -1,3 +1,4 @@
+// @ts-ignore
 import * as e from "./echo.ts";
 
 function echo(content) {