diff --git a/packages/eslint-plugin/tests/rules/no-unnecessary-condition.test.ts b/packages/eslint-plugin/tests/rules/no-unnecessary-condition.test.ts
index 5418fa198a1..4cb0e1604b7 100644
--- a/packages/eslint-plugin/tests/rules/no-unnecessary-condition.test.ts
+++ b/packages/eslint-plugin/tests/rules/no-unnecessary-condition.test.ts
@@ -285,6 +285,11 @@ function test(a: unknown) {
     `
 function test<T>(a: T) {
   return a ?? 'default';
+}
+    `,
+    `
+function test<T extends string | null>(a: T) {
+  return a ?? 'default';
 }
     `,
     // Indexing cases
@@ -832,6 +837,14 @@ function test(a: string) {
       code: `
 function test(a: string | false) {
   return a ?? 'default';
+}
+      `,
+      errors: [ruleError(3, 10, 'neverNullish')],
+    },
+    {
+      code: `
+function test<T extends string>(a: T) {
+  return a ?? 'default';
 }
       `,
       errors: [ruleError(3, 10, 'neverNullish')],
@@ -863,6 +876,14 @@ function test(a: null[]) {
     },
     {
       code: `
+function test<T extends null>(a: T) {
+  return a ?? 'default';
+}
+      `,
+      errors: [ruleError(3, 10, 'alwaysNullish')],
+    },
+    {
+      code: `
 function test(a: never) {
   return a ?? 'default';
 }