diff --git a/actions-workflow-parser/src/templates/tokens/null-token.ts b/actions-workflow-parser/src/templates/tokens/null-token.ts
index 5474c10..11fabda 100644
--- a/actions-workflow-parser/src/templates/tokens/null-token.ts
+++ b/actions-workflow-parser/src/templates/tokens/null-token.ts
@@ -23,6 +23,6 @@ export class NullToken extends LiteralToken {
   }
 
   public override toJSON() {
-    return "null";
+    return null;
   }
 }
diff --git a/actions-workflow-parser/src/templates/tokens/serialization.ts b/actions-workflow-parser/src/templates/tokens/serialization.ts
index 5dd6f9d..3e10bbf 100644
--- a/actions-workflow-parser/src/templates/tokens/serialization.ts
+++ b/actions-workflow-parser/src/templates/tokens/serialization.ts
@@ -29,4 +29,5 @@ export type SerializedToken =
   | string
   | number
   | boolean
+  | null
   | undefined;
diff --git a/actions-workflow-parser/testdata/reader/reusable-workflow-job-basic.yml b/actions-workflow-parser/testdata/reader/reusable-workflow-job-basic.yml
index 9d9c070..37fd6ee 100644
--- a/actions-workflow-parser/testdata/reader/reusable-workflow-job-basic.yml
+++ b/actions-workflow-parser/testdata/reader/reusable-workflow-job-basic.yml
@@ -1,7 +1,6 @@
 include-source: false # Drop file/line/col from output
 skip:
   - Go
-  - TypeScript
 ---
 on: push
 jobs:
diff --git a/actions-workflow-parser/testdata/reader/reusable-workflow-secrets-secret-without-definition.yml b/actions-workflow-parser/testdata/reader/reusable-workflow-secrets-secret-without-definition.yml
index 2c8e078..664f4fc 100644
--- a/actions-workflow-parser/testdata/reader/reusable-workflow-secrets-secret-without-definition.yml
+++ b/actions-workflow-parser/testdata/reader/reusable-workflow-secrets-secret-without-definition.yml
@@ -1,7 +1,6 @@
 include-source: false # Drop file/line/col from output
 skip:
   - Go
-  - TypeScript
 ---
 on: push
 jobs:
diff --git a/actions-workflow-parser/testdata/reader/yaml-schema-null.yml b/actions-workflow-parser/testdata/reader/yaml-schema-null.yml
index 6349637..0e73a48 100644
--- a/actions-workflow-parser/testdata/reader/yaml-schema-null.yml
+++ b/actions-workflow-parser/testdata/reader/yaml-schema-null.yml
@@ -1,6 +1,4 @@
 include-source: false # Drop file/line/col from output
-skip:
-  - TypeScript
 ---
 on: push
 jobs: