diff --git a/tests/baselines/reference/infiniteConstraints.errors.txt b/tests/baselines/reference/infiniteConstraints.errors.txt
index 108c369378..387b0daac6 100644
--- a/tests/baselines/reference/infiniteConstraints.errors.txt
+++ b/tests/baselines/reference/infiniteConstraints.errors.txt
@@ -2,9 +2,10 @@ tests/cases/compiler/infiniteConstraints.ts(4,37): error TS2536: Type '"val"' ca
 tests/cases/compiler/infiniteConstraints.ts(31,42): error TS2345: Argument of type '{ main: Record<"val", "dup">; alternate: Record<"val", "dup">; }' is not assignable to parameter of type '{ main: never; alternate: never; }'.
   Types of property 'main' are incompatible.
     Type 'Record<"val", "dup">' is not assignable to type 'never'.
+tests/cases/compiler/infiniteConstraints.ts(36,71): error TS2536: Type '"foo"' cannot be used to index type 'T[keyof T]'.
 
 
-==== tests/cases/compiler/infiniteConstraints.ts (2 errors) ====
+==== tests/cases/compiler/infiniteConstraints.ts (3 errors) ====
     // Both of the following types trigger the recursion limiter in getImmediateBaseConstraint
     
     type T1<B extends { [K in keyof B]: Extract<B[Exclude<keyof B, K>], { val: string }>["val"] }> = B;
@@ -42,4 +43,11 @@ tests/cases/compiler/infiniteConstraints.ts(31,42): error TS2345: Argument of ty
 !!! error TS2345: Argument of type '{ main: Record<"val", "dup">; alternate: Record<"val", "dup">; }' is not assignable to parameter of type '{ main: never; alternate: never; }'.
 !!! error TS2345:   Types of property 'main' are incompatible.
 !!! error TS2345:     Type 'Record<"val", "dup">' is not assignable to type 'never'.
+    
+    // Repro from #26448
+    
+    type Cond<T> = T extends number ? number : never;
+    declare function function1<T extends {[K in keyof T]: Cond<T[K]>}>(): T[keyof T]["foo"];
+                                                                          ~~~~~~~~~~~~~~~~~
+!!! error TS2536: Type '"foo"' cannot be used to index type 'T[keyof T]'.
     
\ No newline at end of file
diff --git a/tests/baselines/reference/infiniteConstraints.js b/tests/baselines/reference/infiniteConstraints.js
index 0ad3b676f1..03a4d70e00 100644
--- a/tests/baselines/reference/infiniteConstraints.js
+++ b/tests/baselines/reference/infiniteConstraints.js
@@ -30,6 +30,11 @@ const noError = ensureNoDuplicates({main: value("test"), alternate: value("test2
 const shouldBeNoError = ensureNoDuplicates({main: value("test")});
 
 const shouldBeError = ensureNoDuplicates({main: value("dup"), alternate: value("dup")});
+
+// Repro from #26448
+
+type Cond<T> = T extends number ? number : never;
+declare function function1<T extends {[K in keyof T]: Cond<T[K]>}>(): T[keyof T]["foo"];
 
 
 //// [infiniteConstraints.js]
diff --git a/tests/baselines/reference/infiniteConstraints.symbols b/tests/baselines/reference/infiniteConstraints.symbols
index 0f0d44c9f5..6306203a7e 100644
--- a/tests/baselines/reference/infiniteConstraints.symbols
+++ b/tests/baselines/reference/infiniteConstraints.symbols
@@ -120,3 +120,21 @@ const shouldBeError = ensureNoDuplicates({main: value("dup"), alternate: value("
 >alternate : Symbol(alternate, Decl(infiniteConstraints.ts, 30, 61))
 >value : Symbol(value, Decl(infiniteConstraints.ts, 15, 57))
 
+// Repro from #26448
+
+type Cond<T> = T extends number ? number : never;
+>Cond : Symbol(Cond, Decl(infiniteConstraints.ts, 30, 88))
+>T : Symbol(T, Decl(infiniteConstraints.ts, 34, 10))
+>T : Symbol(T, Decl(infiniteConstraints.ts, 34, 10))
+
+declare function function1<T extends {[K in keyof T]: Cond<T[K]>}>(): T[keyof T]["foo"];
+>function1 : Symbol(function1, Decl(infiniteConstraints.ts, 34, 49))
+>T : Symbol(T, Decl(infiniteConstraints.ts, 35, 27))
+>K : Symbol(K, Decl(infiniteConstraints.ts, 35, 39))
+>T : Symbol(T, Decl(infiniteConstraints.ts, 35, 27))
+>Cond : Symbol(Cond, Decl(infiniteConstraints.ts, 30, 88))
+>T : Symbol(T, Decl(infiniteConstraints.ts, 35, 27))
+>K : Symbol(K, Decl(infiniteConstraints.ts, 35, 39))
+>T : Symbol(T, Decl(infiniteConstraints.ts, 35, 27))
+>T : Symbol(T, Decl(infiniteConstraints.ts, 35, 27))
+
diff --git a/tests/baselines/reference/infiniteConstraints.types b/tests/baselines/reference/infiniteConstraints.types
index 78fbc9beca..e23e138c82 100644
--- a/tests/baselines/reference/infiniteConstraints.types
+++ b/tests/baselines/reference/infiniteConstraints.types
@@ -87,3 +87,11 @@ const shouldBeError = ensureNoDuplicates({main: value("dup"), alternate: value("
 >value : <V extends string>(val: V) => Record<"val", V>
 >"dup" : "dup"
 
+// Repro from #26448
+
+type Cond<T> = T extends number ? number : never;
+>Cond : Cond<T>
+
+declare function function1<T extends {[K in keyof T]: Cond<T[K]>}>(): T[keyof T]["foo"];
+>function1 : <T extends { [K in keyof T]: Cond<T[K]>; }>() => T[keyof T]["foo"]
+