diff --git a/app/interactors/find_user_by_reset_token.rb b/app/interactors/find_user_by_reset_token.rb
index de93e0c..340c864 100644
--- a/app/interactors/find_user_by_reset_token.rb
+++ b/app/interactors/find_user_by_reset_token.rb
@@ -1,6 +1,19 @@
-class FindUserByResetToken
-  include Interactor
+class FindUserByResetToken < StandardInteraction
+  def validate_input
+    context.fail!(errors: "invalid input") unless context.reset_token
+  end
+
+  def execute
+    context.user = User.find_by(reset_digest: digest_token)
+  end
+
+  def validate_output
+    context.fail!(errors: "invalid output") unless context.user
+  end
+
+  private
 
-  def call
+  def digest_token
+    Encryptor.digest_token(context.reset_token)
   end
 end
diff --git a/spec/interactors/find_user_by_reset_token_spec.rb b/spec/interactors/find_user_by_reset_token_spec.rb
new file mode 100644
index 0000000..0cc9eb7
--- /dev/null
+++ b/spec/interactors/find_user_by_reset_token_spec.rb
@@ -0,0 +1,57 @@
+RSpec.describe FindUserByResetToken do
+  describe ".call" do
+    let(:token) { Encryptor.generate_token }
+
+    context "when successful" do
+      let!(:user) { create(:confirmed_user, reset_digest: token[0]) }
+
+      subject do
+        described_class.call(reset_token: token[1])
+      end
+
+      it "is a success" do
+        is_expected.to be_a_success
+      end
+
+      it "find the user" do
+        expect(subject.user).to eq(user)
+      end
+    end
+
+    context "when reset token not provided" do
+      before do
+        create(:confirmed_user, reset_digest: token[0])
+      end
+
+      subject do
+        described_class.call(reset_token: nil)
+      end
+
+      it "fails" do
+        is_expected.to be_a_failure
+      end
+
+      it "adds an error to errors" do
+        expect(subject.errors).to eq("invalid input")
+      end
+    end
+
+    context "when user not found" do
+      before do
+        create(:confirmed_user, reset_digest: "differenttoken")
+      end
+
+      subject do
+        described_class.call(reset_token: token[1])
+      end
+
+      it "fails" do
+        is_expected.to be_a_failure
+      end
+
+      it "adds an error to errors" do
+        expect(subject.errors).to eq("invalid output")
+      end
+    end
+  end
+end