diff --git a/types/n3/index.d.ts b/types/n3/index.d.ts
index 9b2c10dfbd4eaa..556984cd8ec3cc 100644
--- a/types/n3/index.d.ts
+++ b/types/n3/index.d.ts
@@ -201,10 +201,12 @@ export interface ParserOptions {
     baseIRI?: string | undefined;
     blankNodePrefix?: string | undefined;
     isImpliedBy?: boolean | undefined;
+    emptyFormulaAsTrue?: boolean | undefined;
 }
 
 export interface StreamParserOptions extends ParserOptions {
     options?: boolean | undefined;
+    comments?: boolean | undefined;
 }
 
 export type ParseCallback<Q extends BaseQuad = Quad> = (error: Error, quad: Q, prefixes: Prefixes) => void;
@@ -237,6 +239,8 @@ export interface WriterOptions {
     format?: string | MimeFormat | undefined;
     prefixes?: Prefixes<RDF.NamedNode | string> | undefined;
     end?: boolean | undefined;
+    baseIRI?: string | undefined;
+    writeBase?: boolean | undefined;
 }
 
 export class Writer<Q extends RDF.BaseQuad = RDF.Quad> {
diff --git a/types/n3/n3-tests.ts b/types/n3/n3-tests.ts
index 6cf4a92ef52c60..a7abccb05af3eb 100644
--- a/types/n3/n3-tests.ts
+++ b/types/n3/n3-tests.ts
@@ -522,6 +522,16 @@ function test_parser_options() {
         format: "text/Turtle*",
         blankNodePrefix: "",
     });
+    const parser7 = new N3.Parser({
+        baseIRI: "http://example.org/",
+        factory: N3.DataFactory,
+        format: "text/n3",
+        blankNodePrefix: "",
+        emptyFormulaAsTrue: true,
+    });
+    const streamParser = new N3.StreamParser({
+        comments: true,
+    });
 }
 
 function test_term_to_and_from_id() {
@@ -638,5 +648,10 @@ function test_get_rules_from_dataset() {
     const rules: N3.Rule[] = N3.getRulesFromDataset(store);
 }
 
+function test_writer_base_iri() {
+    const writer1 = new N3.Writer({ baseIRI: "http://example.org/" });
+    const writer2 = new N3.Writer({ baseIRI: "http://example.org/", writeBase: true });
+}
+
 export const namedNode: ReturnType<RDF.DataFactory["namedNode"]> = N3.DataFactory.namedNode("hello world");
 export const df: RDF.DataFactory = N3.DataFactory;