diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 0e1f08a69d8..6b325bf6abe 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -3906,6 +3906,7 @@ namespace ts {
         AlwaysStrict      = 1 << 4,  // Always use strict rules for contravariant inferences
     }
 
+    /* @internal */
     export interface InferenceInfo {
         typeParameter: TypeParameter;  // Type parameter for which inferences are being made
         candidates: Type[];            // Candidates in covariant positions (or undefined)
@@ -3916,6 +3917,7 @@ namespace ts {
         isFixed: boolean;              // True if inferences are fixed
     }
 
+    /* @internal */
     export const enum InferenceFlags {
         None            =      0,  // No special inference behaviors
         InferUnionTypes = 1 << 0,  // Infer union types for disjoint candidates (otherwise unknownType)
@@ -3932,12 +3934,14 @@ namespace ts {
      * x | y is Maybe if either x or y is Maybe, but neither x or y is True.
      * x | y is True if either x or y is True.
      */
+    /* @internal */
     export const enum Ternary {
         False = 0,
         Maybe = 1,
         True = -1
     }
 
+    /* @internal */
     export type TypeComparer = (s: Type, t: Type, reportErrors?: boolean) => Ternary;
 
     /* @internal */
diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index ee3bd07d280..9f5ceb1f0cb 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -2227,36 +2227,6 @@ declare namespace ts {
         NoConstraints = 8,
         AlwaysStrict = 16,
     }
-    interface InferenceInfo {
-        typeParameter: TypeParameter;
-        candidates: Type[];
-        contraCandidates: Type[];
-        inferredType: Type;
-        priority: InferencePriority;
-        topLevel: boolean;
-        isFixed: boolean;
-    }
-    enum InferenceFlags {
-        None = 0,
-        InferUnionTypes = 1,
-        NoDefault = 2,
-        AnyDefault = 4,
-    }
-    /**
-     * Ternary values are defined such that
-     * x & y is False if either x or y is False.
-     * x & y is Maybe if either x or y is Maybe, but neither x or y is False.
-     * x & y is True if both x and y are True.
-     * x | y is False if both x and y are False.
-     * x | y is Maybe if either x or y is Maybe, but neither x or y is True.
-     * x | y is True if either x or y is True.
-     */
-    enum Ternary {
-        False = 0,
-        Maybe = 1,
-        True = -1,
-    }
-    type TypeComparer = (s: Type, t: Type, reportErrors?: boolean) => Ternary;
     interface JsFileExtensionInfo {
         extension: string;
         isMixedContent: boolean;
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
index 0075da06668..e5fb0b1e169 100644
--- a/tests/baselines/reference/api/typescript.d.ts
+++ b/tests/baselines/reference/api/typescript.d.ts
@@ -2227,36 +2227,6 @@ declare namespace ts {
         NoConstraints = 8,
         AlwaysStrict = 16,
     }
-    interface InferenceInfo {
-        typeParameter: TypeParameter;
-        candidates: Type[];
-        contraCandidates: Type[];
-        inferredType: Type;
-        priority: InferencePriority;
-        topLevel: boolean;
-        isFixed: boolean;
-    }
-    enum InferenceFlags {
-        None = 0,
-        InferUnionTypes = 1,
-        NoDefault = 2,
-        AnyDefault = 4,
-    }
-    /**
-     * Ternary values are defined such that
-     * x & y is False if either x or y is False.
-     * x & y is Maybe if either x or y is Maybe, but neither x or y is False.
-     * x & y is True if both x and y are True.
-     * x | y is False if both x and y are False.
-     * x | y is Maybe if either x or y is Maybe, but neither x or y is True.
-     * x | y is True if either x or y is True.
-     */
-    enum Ternary {
-        False = 0,
-        Maybe = 1,
-        True = -1,
-    }
-    type TypeComparer = (s: Type, t: Type, reportErrors?: boolean) => Ternary;
     interface JsFileExtensionInfo {
         extension: string;
         isMixedContent: boolean;