diff --git a/Octokit.Reactive/Clients/IObservableTeamsClient.cs b/Octokit.Reactive/Clients/IObservableTeamsClient.cs
index dc17b6f4..0ca0a385 100644
--- a/Octokit.Reactive/Clients/IObservableTeamsClient.cs
+++ b/Octokit.Reactive/Clients/IObservableTeamsClient.cs
@@ -125,16 +125,6 @@ namespace Octokit.Reactive
         /// <returns><see langword="true"/> if the user was removed from the team; <see langword="false"/> otherwise.</returns>
         IObservable<bool> RemoveMembership(int id, string login);
 
-        /// <summary>
-        /// Gets whether the user with the given <paramref name="login"/> 
-        /// is a member of the team with the given <paramref name="id"/>.
-        /// </summary>
-        /// <param name="id">The team to check.</param>
-        /// <param name="login">The user to check.</param>
-        /// <returns><see langword="true"/> if the user is a member of the team; <see langword="false"/> otherwise.</returns>
-        [Obsolete("Use GetMembership(id, login) to detect pending memberships")]
-        IObservable<bool> IsMember(int id, string login);
-
         /// <summary>
         /// Gets whether the user with the given <paramref name="login"/> 
         /// is a member of the team with the given <paramref name="id"/>.
diff --git a/Octokit.Reactive/Clients/ObservableTeamsClient.cs b/Octokit.Reactive/Clients/ObservableTeamsClient.cs
index 1711f78c..31f9b7aa 100644
--- a/Octokit.Reactive/Clients/ObservableTeamsClient.cs
+++ b/Octokit.Reactive/Clients/ObservableTeamsClient.cs
@@ -189,21 +189,6 @@ namespace Octokit.Reactive
             return _client.RemoveMembership(id, login).ToObservable();
         }
 
-        /// <summary>
-        /// Gets whether the user with the given <paramref name="login"/> 
-        /// is a member of the team with the given <paramref name="id"/>.
-        /// </summary>
-        /// <param name="id">The team to check.</param>
-        /// <param name="login">The user to check.</param>
-        /// <returns><see langword="true"/> if the user is a member of the team; <see langword="false"/> otherwise.</returns>
-        [Obsolete("Use GetMembership(id, login) to detect pending memberships")]
-        public IObservable<bool> IsMember(int id, string login)
-        {
-            Ensure.ArgumentNotNullOrEmptyString(login, "login");
-
-            return _client.IsMember(id, login).ToObservable();
-        }
-
         /// <summary>
         /// Gets whether the user with the given <paramref name="login"/> 
         /// is a member of the team with the given <paramref name="id"/>.
diff --git a/Octokit/Clients/ITeamsClient.cs b/Octokit/Clients/ITeamsClient.cs
index ec832db3..4249acaf 100644
--- a/Octokit/Clients/ITeamsClient.cs
+++ b/Octokit/Clients/ITeamsClient.cs
@@ -126,16 +126,6 @@ namespace Octokit
         /// <returns><see langword="true"/> if the user was removed from the team; <see langword="false"/> otherwise.</returns>
         Task<bool> RemoveMembership(int id, string login);
 
-        /// <summary>
-        /// Gets whether the user with the given <paramref name="login"/> 
-        /// is a member of the team with the given <paramref name="id"/>.
-        /// </summary>
-        /// <param name="id">The team to check.</param>
-        /// <param name="login">The user to check.</param>
-        /// <returns><see langword="true"/> if the user is a member of the team; <see langword="false"/> otherwise.</returns>
-        [Obsolete("Use GetMembership(id, login) as this will report on pending requests")]
-        Task<bool> IsMember(int id, string login);
-
         /// <summary>
         /// Gets whether the user with the given <paramref name="login"/> 
         /// is a member of the team with the given <paramref name="id"/>.
diff --git a/Octokit/Clients/TeamsClient.cs b/Octokit/Clients/TeamsClient.cs
index ae721871..3ec477ac 100644
--- a/Octokit/Clients/TeamsClient.cs
+++ b/Octokit/Clients/TeamsClient.cs
@@ -252,31 +252,6 @@ namespace Octokit
             }
         }
 
-        /// <summary>
-        /// Gets whether the user with the given <paramref name="login"/> 
-        /// is a member of the team with the given <paramref name="id"/>.
-        /// </summary>
-        /// <param name="id">The team to check.</param>
-        /// <param name="login">The user to check.</param>
-        /// <returns><see langword="true"/> if the user is a member of the team; <see langword="false"/> otherwise.</returns>
-        [Obsolete("Use GetMembership(id, login) as this will report on pending requests")]
-        public async Task<bool> IsMember(int id, string login)
-        {
-            Ensure.ArgumentNotNullOrEmptyString(login, "login");
-
-            var endpoint = ApiUrls.TeamMember(id, login);
-
-            try
-            {
-                var response = await ApiConnection.Connection.GetResponse<string>(endpoint).ConfigureAwait(false);
-                return response.HttpResponse.StatusCode == HttpStatusCode.NoContent;
-            }
-            catch (NotFoundException)
-            {
-                return false;
-            }
-        }
-
         /// <summary>
         /// Returns all team's repositories.
         /// </summary>