diff --git a/src/api/callback.cc b/src/api/callback.cc
index 4083ae84879..52a8da35b67 100644
--- a/src/api/callback.cc
+++ b/src/api/callback.cc
@@ -96,7 +96,7 @@ void InternalCallbackScope::Close() {
     return;
   }
 
-  Environment::TickInfo* tick_info = env_->tick_info();
+  TickInfo* tick_info = env_->tick_info();
 
   if (!env_->can_call_into_js()) return;
   if (!tick_info->has_tick_scheduled()) {
diff --git a/src/env-inl.h b/src/env-inl.h
index 7481a877184..f379660004f 100644
--- a/src/env-inl.h
+++ b/src/env-inl.h
@@ -268,18 +268,18 @@ inline void ImmediateInfo::ref_count_dec(uint32_t decrement) {
   fields_[kRefCount] -= decrement;
 }
 
-inline Environment::TickInfo::TickInfo(v8::Isolate* isolate)
+inline TickInfo::TickInfo(v8::Isolate* isolate)
     : fields_(isolate, kFieldsCount) {}
 
-inline AliasedBuffer<uint8_t, v8::Uint8Array>& Environment::TickInfo::fields() {
+inline AliasedBuffer<uint8_t, v8::Uint8Array>& TickInfo::fields() {
   return fields_;
 }
 
-inline bool Environment::TickInfo::has_tick_scheduled() const {
+inline bool TickInfo::has_tick_scheduled() const {
   return fields_[kHasTickScheduled] == 1;
 }
 
-inline bool Environment::TickInfo::has_rejection_to_warn() const {
+inline bool TickInfo::has_rejection_to_warn() const {
   return fields_[kHasRejectionToWarn] == 1;
 }
 
@@ -439,7 +439,7 @@ inline ImmediateInfo* Environment::immediate_info() {
   return &immediate_info_;
 }
 
-inline Environment::TickInfo* Environment::tick_info() {
+inline TickInfo* Environment::tick_info() {
   return &tick_info_;
 }
 
diff --git a/src/env.h b/src/env.h
index 27603db19e7..c7ec9670a9f 100644
--- a/src/env.h
+++ b/src/env.h
@@ -647,6 +647,24 @@ class ImmediateInfo {
   AliasedBuffer<uint32_t, v8::Uint32Array> fields_;
 };
 
+class TickInfo {
+ public:
+  inline AliasedBuffer<uint8_t, v8::Uint8Array>& fields();
+  inline bool has_tick_scheduled() const;
+  inline bool has_rejection_to_warn() const;
+
+  TickInfo(const TickInfo&) = delete;
+  TickInfo& operator=(const TickInfo&) = delete;
+
+ private:
+  friend class Environment;  // So we can call the constructor.
+  inline explicit TickInfo(v8::Isolate* isolate);
+
+  enum Fields { kHasTickScheduled = 0, kHasRejectionToWarn, kFieldsCount };
+
+  AliasedBuffer<uint8_t, v8::Uint8Array> fields_;
+};
+
 class Environment {
  public:
   Environment(const Environment&) = delete;
@@ -656,28 +674,6 @@ class Environment {
   inline void PushAsyncCallbackScope();
   inline void PopAsyncCallbackScope();
 
-  class TickInfo {
-   public:
-    inline AliasedBuffer<uint8_t, v8::Uint8Array>& fields();
-    inline bool has_tick_scheduled() const;
-    inline bool has_rejection_to_warn() const;
-
-    TickInfo(const TickInfo&) = delete;
-    TickInfo& operator=(const TickInfo&) = delete;
-
-   private:
-    friend class Environment;  // So we can call the constructor.
-    inline explicit TickInfo(v8::Isolate* isolate);
-
-    enum Fields {
-      kHasTickScheduled = 0,
-      kHasRejectionToWarn,
-      kFieldsCount
-    };
-
-    AliasedBuffer<uint8_t, v8::Uint8Array> fields_;
-  };
-
   enum Flags {
     kNoFlags = 0,
     kIsMainThread = 1 << 0,