diff --git a/README.md b/README.md
index ce194f3..c5936d8 100644
--- a/README.md
+++ b/README.md
@@ -160,8 +160,13 @@ When enabled, values will be generated dynamically when the mock function is cal
 ### useImplementingTypes (`boolean`, defaultValue: `false`)
 
 When enabled, it will support the useImplementingTypes GraphQL codegen configuration.
+
 - When a GraphQL interface is used for a field, this flag will use the implementing types, instead of the interface itself.
 
+### defaultNullableToNull (`boolean`, defaultValue: `false`)
+
+When enabled, it will set all nullable fields to null per default instead of generating a value.
+
 ### fieldGeneration (`{ [typeName: string]: { [fieldName: string]: GeneratorOptions } }`, defaultValue: `undefined`)
 
 This setting allows you to add specific generation to a field for a given type. For example if you have a type called `User` and a field called `birthDate` you can override any generated value there as follows:
diff --git a/src/index.ts b/src/index.ts
index f012164..fb0c773 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -35,6 +35,8 @@ type Options<T = TypeNode> = {
     fieldGeneration?: TypeFieldMap;
     enumsAsTypes?: boolean;
     useImplementingTypes: boolean;
+    defaultNullableToNull: boolean;
+    nonNull: boolean;
 };
 
 const convertName = (value: string, fn: (v: string) => string, transformUnderscore: boolean): string => {
@@ -236,6 +238,9 @@ const handleValueGeneration = (
     if (customScalar) {
         return getCustomValue(customScalar, opts);
     }
+    if (opts.defaultNullableToNull && !opts.nonNull) {
+        return null;
+    }
     return baseGenerator();
 };
 
@@ -375,8 +380,14 @@ const generateMockValue = (opts: Options): string | number | boolean => {
             return generateMockValue({
                 ...opts,
                 currentType: opts.currentType.type,
+                nonNull: true,
             });
         case 'ListType': {
+            const hasOverride = opts.fieldGeneration?.[opts.typeName]?.[opts.fieldName];
+            if (!hasOverride && opts.defaultNullableToNull && !opts.nonNull) {
+                return null;
+            }
+
             const listElements = Array.from({ length: opts.listElementCount }, (_, index) =>
                 generateMockValue({
                     ...opts,
@@ -513,6 +524,7 @@ export interface TypescriptMocksPluginConfig {
     locale?: string;
     enumsAsTypes?: boolean;
     useImplementingTypes?: boolean;
+    defaultNullableToNull?: boolean;
 }
 
 interface TypeItem {
@@ -560,6 +572,7 @@ export const plugin: PluginFunction<TypescriptMocksPluginConfig> = (schema, docu
     const generateLibrary = config.generateLibrary || 'casual';
     const enumsAsTypes = config.enumsAsTypes ?? false;
     const useImplementingTypes = config.useImplementingTypes ?? false;
+    const defaultNullableToNull = config.defaultNullableToNull ?? false;
 
     if (generateLibrary === 'faker' && config.locale) {
         faker.setLocale(config.locale);
@@ -639,6 +652,8 @@ export const plugin: PluginFunction<TypescriptMocksPluginConfig> = (schema, docu
                         fieldGeneration: config.fieldGeneration,
                         enumsAsTypes,
                         useImplementingTypes,
+                        defaultNullableToNull,
+                        nonNull: false,
                     });
 
                     return `        ${fieldName}: overrides && overrides.hasOwnProperty('${fieldName}') ? overrides.${fieldName}! : ${value},`;
@@ -673,6 +688,8 @@ export const plugin: PluginFunction<TypescriptMocksPluginConfig> = (schema, docu
                                       fieldGeneration: config.fieldGeneration,
                                       enumsAsTypes,
                                       useImplementingTypes,
+                                      defaultNullableToNull,
+                                      nonNull: false,
                                   });
 
                                   return `        ${field.name.value}: overrides && overrides.hasOwnProperty('${field.name.value}') ? overrides.${field.name.value}! : ${value},`;
diff --git a/tests/__snapshots__/typescript-mock-data.spec.ts.snap b/tests/__snapshots__/typescript-mock-data.spec.ts.snap
index 5ac3a69..37316f5 100644
--- a/tests/__snapshots__/typescript-mock-data.spec.ts.snap
+++ b/tests/__snapshots__/typescript-mock-data.spec.ts.snap
@@ -1,5 +1,163 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`defaults all nullable fields to null when defaultNullableToNull is set 1`] = `
+"
+export const anAvatar = (overrides?: Partial<Avatar>): Avatar => {
+    return {
+        id: overrides && overrides.hasOwnProperty('id') ? overrides.id! : '0550ff93-dd31-49b4-8c38-ff1cb68bdc38',
+        url: overrides && overrides.hasOwnProperty('url') ? overrides.url! : 'aliquid',
+    };
+};
+
+export const aUser = (overrides?: Partial<User>): User => {
+    return {
+        id: overrides && overrides.hasOwnProperty('id') ? overrides.id! : 'a5756f00-41a6-422a-8a7d-d13ee6a63750',
+        creationDate: overrides && overrides.hasOwnProperty('creationDate') ? overrides.creationDate! : '1970-01-09T16:33:21.532Z',
+        login: overrides && overrides.hasOwnProperty('login') ? overrides.login! : 'libero',
+        avatar: overrides && overrides.hasOwnProperty('avatar') ? overrides.avatar! : null,
+        status: overrides && overrides.hasOwnProperty('status') ? overrides.status! : Status.Online,
+        customStatus: overrides && overrides.hasOwnProperty('customStatus') ? overrides.customStatus! : null,
+        scalarValue: overrides && overrides.hasOwnProperty('scalarValue') ? overrides.scalarValue! : 'neque',
+        camelCaseThing: overrides && overrides.hasOwnProperty('camelCaseThing') ? overrides.camelCaseThing! : null,
+        unionThing: overrides && overrides.hasOwnProperty('unionThing') ? overrides.unionThing! : null,
+        prefixedEnum: overrides && overrides.hasOwnProperty('prefixedEnum') ? overrides.prefixedEnum! : null,
+    };
+};
+
+export const aWithAvatar = (overrides?: Partial<WithAvatar>): WithAvatar => {
+    return {
+        id: overrides && overrides.hasOwnProperty('id') ? overrides.id! : '89f515e7-31e0-461d-a230-c4c7f4dafc5c',
+        avatar: overrides && overrides.hasOwnProperty('avatar') ? overrides.avatar! : null,
+    };
+};
+
+export const aCamelCaseThing = (overrides?: Partial<CamelCaseThing>): CamelCaseThing => {
+    return {
+        id: overrides && overrides.hasOwnProperty('id') ? overrides.id! : '345b9cf9-00fa-4974-800f-aeee5ee7fd42',
+    };
+};
+
+export const aPrefixedResponse = (overrides?: Partial<PrefixedResponse>): PrefixedResponse => {
+    return {
+        ping: overrides && overrides.hasOwnProperty('ping') ? overrides.ping! : 'sunt',
+    };
+};
+
+export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
+    return {
+        abc: overrides && overrides.hasOwnProperty('abc') ? overrides.abc! : 'sit',
+    };
+};
+
+export const aListType = (overrides?: Partial<ListType>): ListType => {
+    return {
+        stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : null,
+    };
+};
+
+export const anUpdateUserInput = (overrides?: Partial<UpdateUserInput>): UpdateUserInput => {
+    return {
+        id: overrides && overrides.hasOwnProperty('id') ? overrides.id! : '1d6a9360-c92b-4660-8e5f-04155047bddc',
+        login: overrides && overrides.hasOwnProperty('login') ? overrides.login! : null,
+        avatar: overrides && overrides.hasOwnProperty('avatar') ? overrides.avatar! : null,
+    };
+};
+
+export const aMutation = (overrides?: Partial<Mutation>): Mutation => {
+    return {
+        updateUser: overrides && overrides.hasOwnProperty('updateUser') ? overrides.updateUser! : null,
+    };
+};
+
+export const aQuery = (overrides?: Partial<Query>): Query => {
+    return {
+        user: overrides && overrides.hasOwnProperty('user') ? overrides.user! : aUser(),
+        prefixed_query: overrides && overrides.hasOwnProperty('prefixed_query') ? overrides.prefixed_query! : aPrefixedResponse(),
+    };
+};
+"
+`;
+
+exports[`overriding works as expected when defaultNullableToNull is true 1`] = `
+"
+export const anAvatar = (overrides?: Partial<Avatar>): Avatar => {
+    return {
+        id: overrides && overrides.hasOwnProperty('id') ? overrides.id! : '0550ff93-dd31-49b4-8c38-ff1cb68bdc38',
+        url: overrides && overrides.hasOwnProperty('url') ? overrides.url! : 'aliquid',
+    };
+};
+
+export const aUser = (overrides?: Partial<User>): User => {
+    return {
+        id: overrides && overrides.hasOwnProperty('id') ? overrides.id! : 'a5756f00-41a6-422a-8a7d-d13ee6a63750',
+        creationDate: overrides && overrides.hasOwnProperty('creationDate') ? overrides.creationDate! : '1970-01-09T16:33:21.532Z',
+        login: overrides && overrides.hasOwnProperty('login') ? overrides.login! : 'libero',
+        avatar: overrides && overrides.hasOwnProperty('avatar') ? overrides.avatar! : someAvatar,
+        status: overrides && overrides.hasOwnProperty('status') ? overrides.status! : Status.Online,
+        customStatus: overrides && overrides.hasOwnProperty('customStatus') ? overrides.customStatus! : 'abc',
+        scalarValue: overrides && overrides.hasOwnProperty('scalarValue') ? overrides.scalarValue! : 'neque',
+        camelCaseThing: overrides && overrides.hasOwnProperty('camelCaseThing') ? overrides.camelCaseThing! : null,
+        unionThing: overrides && overrides.hasOwnProperty('unionThing') ? overrides.unionThing! : null,
+        prefixedEnum: overrides && overrides.hasOwnProperty('prefixedEnum') ? overrides.prefixedEnum! : null,
+    };
+};
+
+export const aWithAvatar = (overrides?: Partial<WithAvatar>): WithAvatar => {
+    return {
+        id: overrides && overrides.hasOwnProperty('id') ? overrides.id! : '89f515e7-31e0-461d-a230-c4c7f4dafc5c',
+        avatar: overrides && overrides.hasOwnProperty('avatar') ? overrides.avatar! : null,
+    };
+};
+
+export const aCamelCaseThing = (overrides?: Partial<CamelCaseThing>): CamelCaseThing => {
+    return {
+        id: overrides && overrides.hasOwnProperty('id') ? overrides.id! : '345b9cf9-00fa-4974-800f-aeee5ee7fd42',
+    };
+};
+
+export const aPrefixedResponse = (overrides?: Partial<PrefixedResponse>): PrefixedResponse => {
+    return {
+        ping: overrides && overrides.hasOwnProperty('ping') ? overrides.ping! : 'sunt',
+    };
+};
+
+export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
+    return {
+        abc: overrides && overrides.hasOwnProperty('abc') ? overrides.abc! : 'sit',
+    };
+};
+
+export const aListType = (overrides?: Partial<ListType>): ListType => {
+    return {
+        stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['abc'],
+    };
+};
+
+export const anUpdateUserInput = (overrides?: Partial<UpdateUserInput>): UpdateUserInput => {
+    return {
+        id: overrides && overrides.hasOwnProperty('id') ? overrides.id! : '1d6a9360-c92b-4660-8e5f-04155047bddc',
+        login: overrides && overrides.hasOwnProperty('login') ? overrides.login! : null,
+        avatar: overrides && overrides.hasOwnProperty('avatar') ? overrides.avatar! : null,
+    };
+};
+
+export const aMutation = (overrides?: Partial<Mutation>): Mutation => {
+    return {
+        updateUser: overrides && overrides.hasOwnProperty('updateUser') ? overrides.updateUser! : null,
+    };
+};
+
+export const aQuery = (overrides?: Partial<Query>): Query => {
+    return {
+        user: overrides && overrides.hasOwnProperty('user') ? overrides.user! : aUser(),
+        prefixed_query: overrides && overrides.hasOwnProperty('prefixed_query') ? overrides.prefixed_query! : aPrefixedResponse(),
+    };
+};
+"
+`;
+
 exports[`should add custom prefix if the \`prefix\` config option is specified 1`] = `
 "
 export const mockAvatar = (overrides?: Partial<Avatar>): Avatar => {
@@ -52,6 +210,7 @@ export const mockAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const mockListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -130,6 +289,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -209,6 +369,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -288,6 +449,7 @@ export const anAbcType = (overrides?: Partial<Api.AbcType>): Api.AbcType => {
 export const aListType = (overrides?: Partial<Api.ListType>): Api.ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -366,6 +528,7 @@ export const anAbcType = (overrides?: Partial<Api.AbcType>): Api.AbcType => {
 export const aListType = (overrides?: Partial<Api.ListType>): Api.ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -445,6 +608,7 @@ export const anAbcType = (overrides?: Partial<Api.AbcType>): Api.AbcType => {
 export const aListType = (overrides?: Partial<Api.ListType>): Api.ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -523,6 +687,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -601,6 +766,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -679,6 +845,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -757,6 +924,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -835,6 +1003,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -916,6 +1085,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : [casual.word],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : [casual.word],
     };
 };
 
@@ -999,6 +1169,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : [faker.lorem.word()],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : [faker.lorem.word()],
     };
 };
 
@@ -1079,6 +1250,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -1157,6 +1329,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -1236,6 +1409,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -1314,6 +1488,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -1392,6 +1567,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -1470,6 +1646,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -1548,6 +1725,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -1626,6 +1804,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -1705,6 +1884,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -1783,6 +1963,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -1861,6 +2042,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -1939,6 +2121,7 @@ export const anABCType = (overrides?: Partial<ABCType>): ABCType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -2017,6 +2200,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -2102,6 +2286,7 @@ export const aListType = (overrides?: Partial<ListType>): { __typename: 'ListTyp
     return {
         __typename: 'ListType',
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -2182,6 +2367,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -2260,6 +2446,7 @@ export const anABCTYPE = (overrides?: Partial<ABCTYPE>): ABCTYPE => {
 export const aLISTTYPE = (overrides?: Partial<LISTTYPE>): LISTTYPE => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -2339,6 +2526,7 @@ export const anABCTYPE = (overrides?: Partial<ABCTYPE>): ABCTYPE => {
 export const aLISTTYPE = (overrides?: Partial<LISTTYPE>): LISTTYPE => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -2418,6 +2606,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['id', 'soluta', 'quis'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['soluta', 'deserunt', 'ut'],
     };
 };
 
@@ -2497,6 +2686,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : [],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : [],
     };
 };
 
@@ -2576,6 +2766,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -2655,6 +2846,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -2734,6 +2926,7 @@ export const anAbcType = (overrides?: Partial<ApiAbcType>): ApiAbcType => {
 export const aListType = (overrides?: Partial<ApiListType>): ApiListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -2813,6 +3006,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -2892,6 +3086,7 @@ export const anAbcType = (overrides?: Partial<AbcType>): AbcType => {
 export const aListType = (overrides?: Partial<ListType>): ListType => {
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
@@ -2984,6 +3179,7 @@ export const aListType = (overrides?: Partial<ListType>, _relationshipsToOmit: S
     relationshipsToOmit.add('ListType');
     return {
         stringList: overrides && overrides.hasOwnProperty('stringList') ? overrides.stringList! : ['voluptatem'],
+        nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['eum'],
     };
 };
 
diff --git a/tests/typescript-mock-data.spec.ts b/tests/typescript-mock-data.spec.ts
index 3aabf59..e94eb91 100644
--- a/tests/typescript-mock-data.spec.ts
+++ b/tests/typescript-mock-data.spec.ts
@@ -44,6 +44,7 @@ const testSchema = buildSchema(/* GraphQL */ `
 
     type ListType {
         stringList: [String!]!
+        nullableStringList: [String!]
     }
 
     input UpdateUserInput {
@@ -507,3 +508,56 @@ it('should generate dynamic values with faker', async () => {
     expect(result).toBeDefined();
     expect(result).toMatchSnapshot();
 });
+
+it('defaults all nullable fields to null when defaultNullableToNull is set', async () => {
+    const result = await plugin(testSchema, [], { defaultNullableToNull: true });
+
+    expect(result).toBeDefined();
+    expect(result).toContain(
+        "customStatus: overrides && overrides.hasOwnProperty('customStatus') ? overrides.customStatus! : null",
+    );
+    expect(result).toContain(
+        "camelCaseThing: overrides && overrides.hasOwnProperty('camelCaseThing') ? overrides.camelCaseThing! : null",
+    );
+    expect(result).toContain(
+        "unionThing: overrides && overrides.hasOwnProperty('unionThing') ? overrides.unionThing! : null",
+    );
+    expect(result).toContain(
+        "prefixedEnum: overrides && overrides.hasOwnProperty('prefixedEnum') ? overrides.prefixedEnum! : null",
+    );
+    expect(result).toContain("avatar: overrides && overrides.hasOwnProperty('avatar') ? overrides.avatar! : null");
+    expect(result).toContain("login: overrides && overrides.hasOwnProperty('login') ? overrides.login! : null");
+    expect(result).toContain(
+        "nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : null",
+    );
+
+    expect(result).toMatchSnapshot();
+});
+
+it('overriding works as expected when defaultNullableToNull is true', async () => {
+    const result = await plugin(testSchema, [], {
+        defaultNullableToNull: true,
+        fieldGeneration: {
+            User: {
+                customStatus: "'abc'",
+                avatar: 'someAvatar',
+            },
+            ListType: {
+                nullableStringList: "'abc'",
+            },
+        },
+    });
+
+    expect(result).toBeDefined();
+    expect(result).toContain(
+        "customStatus: overrides && overrides.hasOwnProperty('customStatus') ? overrides.customStatus! : 'abc'",
+    );
+    expect(result).toContain(
+        "avatar: overrides && overrides.hasOwnProperty('avatar') ? overrides.avatar! : someAvatar",
+    );
+    expect(result).toContain(
+        "nullableStringList: overrides && overrides.hasOwnProperty('nullableStringList') ? overrides.nullableStringList! : ['abc']",
+    );
+
+    expect(result).toMatchSnapshot();
+});