diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index d3b64fd20..52a0e24dc 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -6889,7 +6889,7 @@ interface Crypto {
      */
     readonly subtle: SubtleCrypto;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Crypto/getRandomValues) */
-    getRandomValues<T extends ArrayBufferView | null>(array: T): T;
+    getRandomValues<T extends ArrayBufferView>(array: T): T;
     /**
      * Available only in secure contexts.
      *
diff --git a/baselines/serviceworker.generated.d.ts b/baselines/serviceworker.generated.d.ts
index 5cee0af7b..e248aceaa 100644
--- a/baselines/serviceworker.generated.d.ts
+++ b/baselines/serviceworker.generated.d.ts
@@ -1857,7 +1857,7 @@ interface Crypto {
      */
     readonly subtle: SubtleCrypto;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Crypto/getRandomValues) */
-    getRandomValues<T extends ArrayBufferView | null>(array: T): T;
+    getRandomValues<T extends ArrayBufferView>(array: T): T;
     /**
      * Available only in secure contexts.
      *
diff --git a/baselines/sharedworker.generated.d.ts b/baselines/sharedworker.generated.d.ts
index 19f7785cc..9d750580d 100644
--- a/baselines/sharedworker.generated.d.ts
+++ b/baselines/sharedworker.generated.d.ts
@@ -1722,7 +1722,7 @@ interface Crypto {
      */
     readonly subtle: SubtleCrypto;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Crypto/getRandomValues) */
-    getRandomValues<T extends ArrayBufferView | null>(array: T): T;
+    getRandomValues<T extends ArrayBufferView>(array: T): T;
     /**
      * Available only in secure contexts.
      *
diff --git a/baselines/ts5.5/dom.generated.d.ts b/baselines/ts5.5/dom.generated.d.ts
index 31829ff26..dee86d851 100644
--- a/baselines/ts5.5/dom.generated.d.ts
+++ b/baselines/ts5.5/dom.generated.d.ts
@@ -6882,7 +6882,7 @@ interface Crypto {
      */
     readonly subtle: SubtleCrypto;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Crypto/getRandomValues) */
-    getRandomValues<T extends ArrayBufferView | null>(array: T): T;
+    getRandomValues<T extends ArrayBufferView>(array: T): T;
     /**
      * Available only in secure contexts.
      *
diff --git a/baselines/ts5.5/serviceworker.generated.d.ts b/baselines/ts5.5/serviceworker.generated.d.ts
index 7c78f95fd..8eae809df 100644
--- a/baselines/ts5.5/serviceworker.generated.d.ts
+++ b/baselines/ts5.5/serviceworker.generated.d.ts
@@ -1857,7 +1857,7 @@ interface Crypto {
      */
     readonly subtle: SubtleCrypto;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Crypto/getRandomValues) */
-    getRandomValues<T extends ArrayBufferView | null>(array: T): T;
+    getRandomValues<T extends ArrayBufferView>(array: T): T;
     /**
      * Available only in secure contexts.
      *
diff --git a/baselines/ts5.5/sharedworker.generated.d.ts b/baselines/ts5.5/sharedworker.generated.d.ts
index 27f0207b1..e0df20411 100644
--- a/baselines/ts5.5/sharedworker.generated.d.ts
+++ b/baselines/ts5.5/sharedworker.generated.d.ts
@@ -1722,7 +1722,7 @@ interface Crypto {
      */
     readonly subtle: SubtleCrypto;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Crypto/getRandomValues) */
-    getRandomValues<T extends ArrayBufferView | null>(array: T): T;
+    getRandomValues<T extends ArrayBufferView>(array: T): T;
     /**
      * Available only in secure contexts.
      *
diff --git a/baselines/ts5.5/webworker.generated.d.ts b/baselines/ts5.5/webworker.generated.d.ts
index 2f5543684..2eb67b611 100644
--- a/baselines/ts5.5/webworker.generated.d.ts
+++ b/baselines/ts5.5/webworker.generated.d.ts
@@ -2219,7 +2219,7 @@ interface Crypto {
      */
     readonly subtle: SubtleCrypto;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Crypto/getRandomValues) */
-    getRandomValues<T extends ArrayBufferView | null>(array: T): T;
+    getRandomValues<T extends ArrayBufferView>(array: T): T;
     /**
      * Available only in secure contexts.
      *
diff --git a/baselines/ts5.6/dom.generated.d.ts b/baselines/ts5.6/dom.generated.d.ts
index 435ce4c60..a3aab0a44 100644
--- a/baselines/ts5.6/dom.generated.d.ts
+++ b/baselines/ts5.6/dom.generated.d.ts
@@ -6889,7 +6889,7 @@ interface Crypto {
      */
     readonly subtle: SubtleCrypto;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Crypto/getRandomValues) */
-    getRandomValues<T extends ArrayBufferView | null>(array: T): T;
+    getRandomValues<T extends ArrayBufferView>(array: T): T;
     /**
      * Available only in secure contexts.
      *
diff --git a/baselines/ts5.6/serviceworker.generated.d.ts b/baselines/ts5.6/serviceworker.generated.d.ts
index 7c78f95fd..8eae809df 100644
--- a/baselines/ts5.6/serviceworker.generated.d.ts
+++ b/baselines/ts5.6/serviceworker.generated.d.ts
@@ -1857,7 +1857,7 @@ interface Crypto {
      */
     readonly subtle: SubtleCrypto;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Crypto/getRandomValues) */
-    getRandomValues<T extends ArrayBufferView | null>(array: T): T;
+    getRandomValues<T extends ArrayBufferView>(array: T): T;
     /**
      * Available only in secure contexts.
      *
diff --git a/baselines/ts5.6/sharedworker.generated.d.ts b/baselines/ts5.6/sharedworker.generated.d.ts
index 27f0207b1..e0df20411 100644
--- a/baselines/ts5.6/sharedworker.generated.d.ts
+++ b/baselines/ts5.6/sharedworker.generated.d.ts
@@ -1722,7 +1722,7 @@ interface Crypto {
      */
     readonly subtle: SubtleCrypto;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Crypto/getRandomValues) */
-    getRandomValues<T extends ArrayBufferView | null>(array: T): T;
+    getRandomValues<T extends ArrayBufferView>(array: T): T;
     /**
      * Available only in secure contexts.
      *
diff --git a/baselines/ts5.6/webworker.generated.d.ts b/baselines/ts5.6/webworker.generated.d.ts
index 2f5543684..2eb67b611 100644
--- a/baselines/ts5.6/webworker.generated.d.ts
+++ b/baselines/ts5.6/webworker.generated.d.ts
@@ -2219,7 +2219,7 @@ interface Crypto {
      */
     readonly subtle: SubtleCrypto;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Crypto/getRandomValues) */
-    getRandomValues<T extends ArrayBufferView | null>(array: T): T;
+    getRandomValues<T extends ArrayBufferView>(array: T): T;
     /**
      * Available only in secure contexts.
      *
diff --git a/baselines/webworker.generated.d.ts b/baselines/webworker.generated.d.ts
index 95e743c50..14209458d 100644
--- a/baselines/webworker.generated.d.ts
+++ b/baselines/webworker.generated.d.ts
@@ -2219,7 +2219,7 @@ interface Crypto {
      */
     readonly subtle: SubtleCrypto;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Crypto/getRandomValues) */
-    getRandomValues<T extends ArrayBufferView | null>(array: T): T;
+    getRandomValues<T extends ArrayBufferView>(array: T): T;
     /**
      * Available only in secure contexts.
      *
diff --git a/inputfiles/overridingTypes.jsonc b/inputfiles/overridingTypes.jsonc
index d87d431f5..4ad85c4a2 100644
--- a/inputfiles/overridingTypes.jsonc
+++ b/inputfiles/overridingTypes.jsonc
@@ -2581,7 +2581,7 @@
                                     "typeParameters": [
                                         {
                                             "name": "T",
-                                            "extends": "ArrayBufferView | null"
+                                            "extends": "ArrayBufferView"
                                         }
                                     ],
                                     "param": [