diff --git a/src/utils/typescript.ts b/src/utils/typescript.ts
index 09b0af1df..6cb19c26b 100644
--- a/src/utils/typescript.ts
+++ b/src/utils/typescript.ts
@@ -27,6 +27,9 @@ export const tryToRegisterTsNode = (): void => {
                 skipProject: JSON.parse(skipProjectRaw),
                 transpileOnly: JSON.parse(transpileOnlyRaw),
                 swc: JSON.parse(swcRaw),
+                compilerOptions: {
+                    allowJs: true,
+                },
             });
         } catch (err) {
             const params = `swc: "${swcRaw}", transpileOnly: "${transpileOnlyRaw}", skipProject: "${skipProjectRaw}"`;
diff --git a/test/src/utils/typescript.ts b/test/src/utils/typescript.ts
index 282505ef8..fc78e4e1e 100644
--- a/test/src/utils/typescript.ts
+++ b/test/src/utils/typescript.ts
@@ -33,6 +33,19 @@ describe("utils/typescript", () => {
             assert.notCalled(registerStub);
         });
 
+        it("should pass 'allowJs' option", () => {
+            ts.tryToRegisterTsNode();
+
+            assert.calledOnceWith(
+                registerStub,
+                sinon.match({
+                    compilerOptions: {
+                        allowJs: true,
+                    },
+                }),
+            );
+        });
+
         it("should respect env vars", () => {
             process.env.TS_NODE_SKIP_PROJECT = "false";
             process.env.TS_NODE_TRANSPILE_ONLY = "false";