diff --git a/ruby/lib/jam_ruby/app/mailers/user_mailer.rb b/ruby/lib/jam_ruby/app/mailers/user_mailer.rb
index c87ea7e3a..5b334c4ed 100644
--- a/ruby/lib/jam_ruby/app/mailers/user_mailer.rb
+++ b/ruby/lib/jam_ruby/app/mailers/user_mailer.rb
@@ -952,7 +952,7 @@ module JamRuby
       @session_url = lesson_session.web_url
       @lesson_session = lesson_session
 
-      email = @student.email
+      email = @teacher.email
       subject = "Your TestDrive with #{@teacher.name} was not successful"
       unique_args = {:type => "teacher_test_drive_no_bill"}
 
@@ -960,7 +960,7 @@ module JamRuby
       sendgrid_unique_args :type => unique_args[:type]
 
       sendgrid_recipients([email])
-      sendgrid_substitute('@USERID', [@student.id])
+      sendgrid_substitute('@USERID', [@teacher.id])
 
       mail(:to => email, :subject => subject) do |format|
         format.text
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/student_test_drive_no_bill.html.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/student_test_drive_no_bill.html.erb
index deee9c563..a10a0bc5d 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/student_test_drive_no_bill.html.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/student_test_drive_no_bill.html.erb
@@ -6,7 +6,7 @@
     Hello <%= @student.name %>,
   </p>
 
-  <p>You have not used a credit for today's TestDrive with <%= @teacher.name %>.
+  <p>You have not used a credit for today's TestDrive with <%= @teacher.name %> because <%= @lesson_session.error_display %>.
     <br/>
     <br/>
     Click the button below to see more information about this session.
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/teacher_test_drive_no_bill.html.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/teacher_test_drive_no_bill.html.erb
index 4045e0bbf..63b6ad7cb 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/teacher_test_drive_no_bill.html.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/teacher_test_drive_no_bill.html.erb
@@ -6,7 +6,7 @@
     Hello <%= @teacher.name %>,
   </p>
 
-  <p>Your TestDrive with <%= @student.name %> was not successful because <@= lesson_session.error_display %>.
+  <p>Your TestDrive with <%= @student.name %> was not successful because <%= @lesson_session.error_display %>.
     <br/>
     <br/>
     Click the button below to see more information about this session.
diff --git a/ruby/lib/jam_ruby/models/lesson_session.rb b/ruby/lib/jam_ruby/models/lesson_session.rb
index bc0e74a47..a0fd51a06 100644
--- a/ruby/lib/jam_ruby/models/lesson_session.rb
+++ b/ruby/lib/jam_ruby/models/lesson_session.rb
@@ -266,9 +266,23 @@ module JamRuby
 
     def error_display
       if analysed
-        ""
+        if !success
+          analysis_json = JSON.parse(self.analysis)
+          if analysis_json["teacher_analysis"]["missed"] && analysis_json["student_analysis"]["missed"]
+            "both the student and teacher missed the lesson"
+          elsif analysis_json["teacher_analysis"]["missed"]
+            "the teacher missed the lesson"
+          elsif analysis_json["student_analysis"]["missed"]
+            "the student missed the lesson"
+          else
+            "unknown error reason"
+          end
+
+        else
+        "because no error"
+        end
       else
-        "unknown reason"
+        "not yet analysed"
       end
 
     end
diff --git a/ruby/spec/mailers/render_emails_spec.rb b/ruby/spec/mailers/render_emails_spec.rb
index 7ef34fe58..5405ae4af 100644
--- a/ruby/spec/mailers/render_emails_spec.rb
+++ b/ruby/spec/mailers/render_emails_spec.rb
@@ -98,6 +98,21 @@ describe "RenderMailers", :slow => true do
         UserMailer.student_scheduled_jamclass_invitation(lesson_session.student, "custom message", lesson_session.music_session).deliver
       end
 
+      it "student_test_drive_no_bill" do
+        @filename = "student_test_drive_no_bill"
+        lesson = testdrive_lesson(user, teacher, {accept: true, miss: true})
+
+        UserMailer.deliveries.clear
+        UserMailer.student_test_drive_no_bill(lesson).deliver
+      end
+
+      it "teacher_test_drive_no_bill" do
+        @filename = "teacher_test_drive_no_bill"
+        lesson = testdrive_lesson(user, teacher, {accept: true, miss: true})
+
+        UserMailer.deliveries.clear
+        UserMailer.teacher_test_drive_no_bill(lesson).deliver
+      end
       it "student_test_drive_lesson_completed" do
         @filename = "student_test_drive_lesson_completed"
         lesson = testdrive_lesson(user, teacher)
diff --git a/ruby/spec/support/lesson_session.rb b/ruby/spec/support/lesson_session.rb
index b263ed73b..420847a76 100644
--- a/ruby/spec/support/lesson_session.rb
+++ b/ruby/spec/support/lesson_session.rb
@@ -74,8 +74,6 @@ def book_lesson(user, teacher, options)
   end
 
   if options[:miss]
-    # teacher & student get into session
-
     Timecop.travel(end_time + 1)