diff --git a/packages/react-relay/relay-hooks/__tests__/FragmentResourceRequiredField-test.js b/packages/react-relay/relay-hooks/__tests__/FragmentResourceRequiredField-test.js
index 962f385a74820..8f07319384c4e 100644
--- a/packages/react-relay/relay-hooks/__tests__/FragmentResourceRequiredField-test.js
+++ b/packages/react-relay/relay-hooks/__tests__/FragmentResourceRequiredField-test.js
@@ -13,7 +13,6 @@
 
 const {getFragmentResourceForEnvironment} = require('../FragmentResource');
 const {
-  RelayFeatureFlags,
   __internal: {fetchQuery},
   createOperationDescriptor,
   getFragment,
@@ -22,14 +21,6 @@ const {
 } = require('relay-runtime');
 const {createMockEnvironment} = require('relay-test-utils');
 
-beforeEach(() => {
-  RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = true;
-});
-
-afterEach(() => {
-  RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = false;
-});
-
 let environment;
 let query;
 let FragmentResource;
diff --git a/packages/react-relay/relay-hooks/__tests__/useFragmentNode-required-test.js b/packages/react-relay/relay-hooks/__tests__/useFragmentNode-required-test.js
index bced27690dde1..cda2f52e77906 100644
--- a/packages/react-relay/relay-hooks/__tests__/useFragmentNode-required-test.js
+++ b/packages/react-relay/relay-hooks/__tests__/useFragmentNode-required-test.js
@@ -22,7 +22,6 @@ const {
   FRAGMENT_OWNER_KEY,
   FRAGMENTS_KEY,
   ID_KEY,
-  RelayFeatureFlags,
   createOperationDescriptor,
   getFragment,
   getRequest,
@@ -63,8 +62,6 @@ beforeEach(() => {
   jest.mock('warning');
   renderSpy = jest.fn();
 
-  RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = true;
-
   // Set up environment and base data
   environment = createMockEnvironment();
 
@@ -129,7 +126,6 @@ beforeEach(() => {
 });
 
 afterEach(() => {
-  RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = false;
   environment.mockClear();
   renderSpy.mockClear();
   // $FlowFixMe[prop-missing]
diff --git a/packages/relay-runtime/mutations/__tests__/commitMutation-test.js b/packages/relay-runtime/mutations/__tests__/commitMutation-test.js
index 29123cf18ba6d..4a1f57dc42ddc 100644
--- a/packages/relay-runtime/mutations/__tests__/commitMutation-test.js
+++ b/packages/relay-runtime/mutations/__tests__/commitMutation-test.js
@@ -28,7 +28,6 @@ const {createReaderSelector} = require('../../store/RelayModernSelector');
 const RelayModernStore = require('../../store/RelayModernStore');
 const RelayRecordSource = require('../../store/RelayRecordSource');
 const {ROOT_ID} = require('../../store/RelayStoreUtils');
-const RelayFeatureFlags = require('../../util/RelayFeatureFlags');
 const commitMutation = require('../commitMutation');
 const nullthrows = require('nullthrows');
 const {createMockEnvironment} = require('relay-test-utils-internal');
@@ -1099,7 +1098,6 @@ describe('Required mutation roots', () => {
   let dataSource;
   let environment;
   beforeEach(() => {
-    RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = true;
     const fetch = jest.fn((_query, _variables, _cacheConfig) => {
       return RelayObservable.create(sink => {
         dataSource = sink;
diff --git a/packages/relay-runtime/query/__tests__/fetchQuery-test.js b/packages/relay-runtime/query/__tests__/fetchQuery-test.js
index 28be3c533e0c9..8953f37f46fd5 100644
--- a/packages/relay-runtime/query/__tests__/fetchQuery-test.js
+++ b/packages/relay-runtime/query/__tests__/fetchQuery-test.js
@@ -15,7 +15,6 @@
 
 const fetchQuery = require('../fetchQuery');
 const {
-  RelayFeatureFlags,
   createOperationDescriptor,
   getRequest,
   graphql,
@@ -227,13 +226,6 @@ describe('fetchQuery', () => {
 });
 
 describe('fetchQuery with missing @required value', () => {
-  beforeEach(() => {
-    RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = true;
-  });
-  afterEach(() => {
-    RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = false;
-  });
-
   it('provides data snapshot on next', () => {
     const requiredFieldLogger = jest.fn();
     const environment = createMockEnvironment({
diff --git a/packages/relay-runtime/store/RelayReader.js b/packages/relay-runtime/store/RelayReader.js
index 25a724853a529..2f31299be3d0c 100644
--- a/packages/relay-runtime/store/RelayReader.js
+++ b/packages/relay-runtime/store/RelayReader.js
@@ -293,13 +293,6 @@ class RelayReader {
       const selection = selections[i];
       switch (selection.kind) {
         case REQUIRED_FIELD:
-          invariant(
-            RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES,
-            'RelayReader(): Encountered a `@required` directive at path "%s" in `%s` without the `ENABLE_REQUIRED_DIRECTIVES` feature flag enabled.',
-            selection.path,
-            this._selector.node.name,
-          );
-
           const fieldValue = this._readRequiredField(selection, record, data);
           if (fieldValue == null) {
             const {action} = selection;
diff --git a/packages/relay-runtime/store/__tests__/RelayModernEnvironment-ConnectionAndRequired-test.js b/packages/relay-runtime/store/__tests__/RelayModernEnvironment-ConnectionAndRequired-test.js
index 997316337c413..8dd2f60e1bf22 100644
--- a/packages/relay-runtime/store/__tests__/RelayModernEnvironment-ConnectionAndRequired-test.js
+++ b/packages/relay-runtime/store/__tests__/RelayModernEnvironment-ConnectionAndRequired-test.js
@@ -28,7 +28,6 @@ const {getSingularSelector} = require('../RelayModernSelector');
 const RelayModernStore = require('../RelayModernStore');
 const RelayRecordSource = require('../RelayRecordSource');
 const nullthrows = require('nullthrows');
-const {RelayFeatureFlags} = require('relay-runtime');
 const {disallowWarnings} = require('relay-test-utils-internal');
 
 disallowWarnings();
@@ -45,8 +44,6 @@ describe.each(['RelayModernEnvironment', 'MultiActorEnvironment'])(
 
     describe(environmentType, () => {
       beforeEach(() => {
-        RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = true;
-
         query = getRequest(graphql`
           query RelayModernEnvironmentConnectionAndRequiredTestFeedbackQuery(
             $id: ID!
diff --git a/packages/relay-runtime/store/__tests__/RelayModernEnvironment-ExecuteWithStreamAndRequired-test.js b/packages/relay-runtime/store/__tests__/RelayModernEnvironment-ExecuteWithStreamAndRequired-test.js
index 1ffa4c35461ae..0c3243c32763e 100644
--- a/packages/relay-runtime/store/__tests__/RelayModernEnvironment-ExecuteWithStreamAndRequired-test.js
+++ b/packages/relay-runtime/store/__tests__/RelayModernEnvironment-ExecuteWithStreamAndRequired-test.js
@@ -28,7 +28,6 @@ const {
 const {createReaderSelector} = require('../RelayModernSelector');
 const RelayModernStore = require('../RelayModernStore');
 const RelayRecordSource = require('../RelayRecordSource');
-const {RelayFeatureFlags} = require('relay-runtime');
 const {disallowWarnings} = require('relay-test-utils-internal');
 
 disallowWarnings();
@@ -44,8 +43,6 @@ describe('execute() a query with @stream and @required', () => {
   let selector;
 
   beforeEach(() => {
-    RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = true;
-
     query = getRequest(graphql`
       query RelayModernEnvironmentExecuteWithStreamAndRequiredTestFeedbackQuery(
         $id: ID!
@@ -94,10 +91,6 @@ describe('execute() a query with @stream and @required', () => {
     });
   });
 
-  afterEach(() => {
-    RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = false;
-  });
-
   it('bubbles @required @stream nodes up to the parent', () => {
     const initialSnapshot = environment.lookup(selector);
     const callback = jest.fn();
diff --git a/packages/relay-runtime/store/__tests__/RelayModernFragmentSpecResolverRequiredField-test.js b/packages/relay-runtime/store/__tests__/RelayModernFragmentSpecResolverRequiredField-test.js
index d7da0c7960118..c9b68aeea75f7 100644
--- a/packages/relay-runtime/store/__tests__/RelayModernFragmentSpecResolverRequiredField-test.js
+++ b/packages/relay-runtime/store/__tests__/RelayModernFragmentSpecResolverRequiredField-test.js
@@ -14,22 +14,9 @@ const RelayModernFragmentSpecResolver = require('../RelayModernFragmentSpecResol
 const {
   createOperationDescriptor,
 } = require('../RelayModernOperationDescriptor');
-const {
-  RelayFeatureFlags,
-  getFragment,
-  getRequest,
-  graphql,
-} = require('relay-runtime');
+const {getFragment, getRequest, graphql} = require('relay-runtime');
 const {createMockEnvironment} = require('relay-test-utils-internal');
 
-beforeEach(() => {
-  RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = true;
-});
-
-afterEach(() => {
-  RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = false;
-});
-
 describe('RelayModernFragmentSpecResolver', () => {
   let UserFragment;
   let UserQuery;
diff --git a/packages/relay-runtime/store/__tests__/RelayModernFragmentSpecResolverRequiredFieldNoLogger-test.js b/packages/relay-runtime/store/__tests__/RelayModernFragmentSpecResolverRequiredFieldNoLogger-test.js
index a064ce118b57f..3d2f3538fd4e4 100644
--- a/packages/relay-runtime/store/__tests__/RelayModernFragmentSpecResolverRequiredFieldNoLogger-test.js
+++ b/packages/relay-runtime/store/__tests__/RelayModernFragmentSpecResolverRequiredFieldNoLogger-test.js
@@ -14,23 +14,13 @@ const RelayModernFragmentSpecResolver = require('../RelayModernFragmentSpecResol
 const {
   createOperationDescriptor,
 } = require('../RelayModernOperationDescriptor');
-const {
-  RelayFeatureFlags,
-  getFragment,
-  getRequest,
-  graphql,
-} = require('relay-runtime');
+const {getFragment, getRequest, graphql} = require('relay-runtime');
 const {createMockEnvironment} = require('relay-test-utils');
 
 const dev = __DEV__;
 
 beforeEach(() => {
   global.__DEV__ = dev;
-  RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = true;
-});
-
-afterEach(() => {
-  RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = false;
 });
 
 describe('RelayModernFragmentSpecResolver', () => {
diff --git a/packages/relay-runtime/store/__tests__/RelayReader-RequiredFields-test.js b/packages/relay-runtime/store/__tests__/RelayReader-RequiredFields-test.js
index b2608ba4e0b49..c1a011eeeccd6 100644
--- a/packages/relay-runtime/store/__tests__/RelayReader-RequiredFields-test.js
+++ b/packages/relay-runtime/store/__tests__/RelayReader-RequiredFields-test.js
@@ -18,49 +18,7 @@ const {read} = require('../RelayReader');
 const RelayRecordSource = require('../RelayRecordSource');
 const {RelayFeatureFlags, createReaderSelector} = require('relay-runtime');
 
-beforeEach(() => {
-  RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = true;
-});
-
-afterEach(() => {
-  RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = false;
-});
-
 describe('RelayReader @required', () => {
-  it('throws if a @required is encounted without the ENABLE_REQUIRED_DIRECTIVES feature flag enabled', () => {
-    const source = RelayRecordSource.create({
-      'client:root': {
-        __id: 'client:root',
-        __typename: '__Root',
-        me: {__ref: '1'},
-      },
-      '1': {
-        __id: '1',
-        id: '1',
-        __typename: 'User',
-        firstName: 'Alice',
-        lastName: null,
-      },
-    });
-    const FooQuery = graphql`
-      query RelayReaderRequiredFieldsTest1Query {
-        me {
-          firstName
-          lastName @required(action: LOG)
-        }
-      }
-    `;
-    const operation = createOperationDescriptor(FooQuery, {id: '1'});
-
-    RelayFeatureFlags.ENABLE_REQUIRED_DIRECTIVES = false;
-
-    expect(() => {
-      read(source, operation.fragment);
-    }).toThrowErrorMatchingInlineSnapshot(
-      '"RelayReader(): Encountered a `@required` directive at path \\"me.lastName\\" in `RelayReaderRequiredFieldsTest1Query` without the `ENABLE_REQUIRED_DIRECTIVES` feature flag enabled."',
-    );
-  });
-
   it('bubbles @required(action: LOG) scalars up to LinkedField', () => {
     const source = RelayRecordSource.create({
       'client:root': {
diff --git a/packages/relay-runtime/util/RelayFeatureFlags.js b/packages/relay-runtime/util/RelayFeatureFlags.js
index aa308fd816a5c..bbdb289687706 100644
--- a/packages/relay-runtime/util/RelayFeatureFlags.js
+++ b/packages/relay-runtime/util/RelayFeatureFlags.js
@@ -20,7 +20,6 @@ export type FeatureFlags = {|
   ENABLE_VARIABLE_CONNECTION_KEY: boolean,
   ENABLE_PARTIAL_RENDERING_DEFAULT: boolean,
   ENABLE_REACT_FLIGHT_COMPONENT_FIELD: boolean,
-  ENABLE_REQUIRED_DIRECTIVES: boolean | string,
   ENABLE_RELAY_RESOLVERS: boolean,
   ENABLE_GETFRAGMENTIDENTIFIER_OPTIMIZATION: boolean,
   ENABLE_FRIENDLY_QUERY_NAME_GQL_URL: boolean,
@@ -42,7 +41,6 @@ const RelayFeatureFlags: FeatureFlags = {
   ENABLE_VARIABLE_CONNECTION_KEY: false,
   ENABLE_PARTIAL_RENDERING_DEFAULT: true,
   ENABLE_REACT_FLIGHT_COMPONENT_FIELD: false,
-  ENABLE_REQUIRED_DIRECTIVES: false,
   ENABLE_RELAY_RESOLVERS: false,
   ENABLE_GETFRAGMENTIDENTIFIER_OPTIMIZATION: false,
   ENABLE_FRIENDLY_QUERY_NAME_GQL_URL: false,