diff --git a/lib/spring/commands/rails.rb b/lib/spring/commands/rails.rb
index e343ee51..f62fe6bc 100644
--- a/lib/spring/commands/rails.rb
+++ b/lib/spring/commands/rails.rb
@@ -84,6 +84,20 @@ def extract_environment(args)
     end
 
     class RailsTest < Rails
+      def env(args)
+        environment = "test"
+
+        args.each.with_index do |arg, i|
+          if arg =~ /--environment=(\w+)/
+            environment = $1
+          elsif i > 0 && args[i - 1] == "-e"
+            environment = arg
+          end
+        end
+
+        environment
+      end
+
       def command_name
         "test"
       end
diff --git a/test/unit/commands_test.rb b/test/unit/commands_test.rb
index c0e67750..c519b699 100644
--- a/test/unit/commands_test.rb
+++ b/test/unit/commands_test.rb
@@ -56,4 +56,19 @@ class CommandsTest < ActiveSupport::TestCase
     assert_equal "test", command.env(["test:models"])
     assert_nil command.env(["test_foo"])
   end
+
+  test 'RailsTest#command defaults to test rails environment' do
+    command = Spring::Commands::RailsTest.new
+    assert_equal 'test', command.env([])
+  end
+
+  test 'RailsTest#command sets rails environment from --environment option' do
+    command = Spring::Commands::RailsTest.new
+    assert_equal 'foo', command.env(['--environment=foo'])
+  end
+
+  test 'RailsTest#command sets rails environment from -e option' do
+    command = Spring::Commands::RailsTest.new
+    assert_equal 'foo', command.env(['-e', 'foo'])
+  end
 end