diff --git a/README.md b/README.md
index f74c1f54..8b022a47 100644
--- a/README.md
+++ b/README.md
@@ -95,6 +95,7 @@ notification: false    # Display notification after the specs are done running,
 run_all: { cmd: 'custom rspec command', message: 'custom message' } # Custom options to use when running all specs
 title: 'My project'    # Display a custom title for the notification, default: 'RSpec results'
 chdir: 'directory'     # run rspec from within a given subdirectory (useful if project has separate specs for submodules)
+results_file: 'some/path' # use the given file for storing results (instead of default relative path)
 ```
 
 ### Using Launchy to view rspec results
diff --git a/lib/guard/rspec/rspec_process.rb b/lib/guard/rspec/rspec_process.rb
index 2c1900ca..09054f84 100644
--- a/lib/guard/rspec/rspec_process.rb
+++ b/lib/guard/rspec/rspec_process.rb
@@ -34,7 +34,8 @@ def _run
       end
 
       def _really_run
-        pid = Kernel.spawn(command) # use spawn to stub in JRuby
+        env = { "GUARD_RSPEC_RESULTS_FILE" => formatter_tmp_file }
+        pid = Kernel.spawn(env, command) # use spawn to stub in JRuby
         result = Process.wait2(pid)
         result.last.exitstatus
       rescue Errno::ENOENT => ex
diff --git a/lib/guard/rspec/runner.rb b/lib/guard/rspec/runner.rb
index 1b6aac56..eb2590b5 100644
--- a/lib/guard/rspec/runner.rb
+++ b/lib/guard/rspec/runner.rb
@@ -49,7 +49,8 @@ def reload
 
       def _run(paths, options, &block)
         fail NoCmdOptionError unless options[:cmd]
-        _really_run(paths, options, &block)
+        command = Command.new(paths, options)
+        _really_run(command, options, &block)
         true
       rescue RSpecProcess::Failure, NoCmdOptionError => ex
         Compat::UI.error(ex.to_s)
@@ -57,11 +58,11 @@ def _run(paths, options, &block)
         false
       end
 
-      def _really_run(paths, options)
+      def _really_run(cmd, options)
         # TODO: add option to specify the file
-        file = _tmp_file(options[:chdir])
+        file = _results_file(options[:results_file], options[:chdir])
 
-        process = RSpecProcess.new(Command.new(paths, options), file)
+        process = RSpecProcess.new(cmd, file)
         results = process.results
 
         inspector.failed(results.failed_paths)
@@ -78,8 +79,10 @@ def _open_launchy
         ::Launchy.open(options[:launchy]) if pn.exist?
       end
 
-      def _tmp_file(chdir)
-        chdir ? File.join(chdir, TEMPORARY_FILE_PATH) : TEMPORARY_FILE_PATH
+      def _results_file(results_file, chdir)
+        results_file ||= TEMPORARY_FILE_PATH
+        return results_file unless Pathname(results_file).relative?
+        chdir ? File.join(chdir, results_file) : results_file
       end
     end
   end
diff --git a/lib/guard/rspec_formatter.rb b/lib/guard/rspec_formatter.rb
index bd7dc457..e31af3b6 100644
--- a/lib/guard/rspec_formatter.rb
+++ b/lib/guard/rspec_formatter.rb
@@ -9,8 +9,6 @@
 
 module Guard
   class RSpecFormatter < ::RSpec::Core::Formatters::BaseFormatter
-    TEMPORARY_FILE_PATH ||= "tmp/rspec_guard_result"
-
     def self.rspec_3?
       ::RSpec::Core::Version::STRING.split(".").first == "3"
     end
@@ -82,7 +80,7 @@ def write_summary(duration, total, failures, pending)
     end
 
     def _write(&block)
-      file = File.expand_path(TEMPORARY_FILE_PATH)
+      file = _results_file
       FileUtils.mkdir_p(File.dirname(file))
       File.open(file, "w", &block)
     end
@@ -109,5 +107,11 @@ def _status_failed?(example)
         example.execution_result[:status].to_s == "failed"
       end
     end
+
+    def _results_file
+      path = ENV["GUARD_RSPEC_RESULTS_FILE"]
+      fail "Fatal: No output file given for Guard::RSpec formatter!" unless path
+      File.expand_path(path)
+    end
   end
 end
diff --git a/spec/lib/guard/rspec/command_spec.rb b/spec/lib/guard/rspec/command_spec.rb
index b8d2452f..30285e90 100644
--- a/spec/lib/guard/rspec/command_spec.rb
+++ b/spec/lib/guard/rspec/command_spec.rb
@@ -46,6 +46,13 @@
     end
 
     context "with no RSpec defined formatter" do
+      before do
+        allow(RSpec::Core::ConfigurationOptions).to receive(:new) do
+          instance_double(RSpec::Core::ConfigurationOptions,
+                          options: { formatters: nil })
+        end
+      end
+
       it "sets default progress formatter" do
         expect(command).to match %r{-f progress}
       end
diff --git a/spec/lib/guard/rspec/rspec_process_spec.rb b/spec/lib/guard/rspec/rspec_process_spec.rb
index 48d6a410..9d75be9e 100644
--- a/spec/lib/guard/rspec/rspec_process_spec.rb
+++ b/spec/lib/guard/rspec/rspec_process_spec.rb
@@ -23,8 +23,11 @@
   end
 
   before do
+    allow(Kernel).to receive(:spawn).
+      with({ "GUARD_RSPEC_RESULTS_FILE" => file }, cmd).and_return(pid)
+
     allow(Guard::RSpec::Results).to receive(:new).
-      with("foobar.txt").and_return(results)
+      with(file).and_return(results)
   end
 
   context "with an non-existing command" do
@@ -41,7 +44,6 @@
 
   context "with an existing command" do
     before do
-      allow(Kernel).to receive(:spawn).with(cmd).and_return(pid)
       allow(Process).to receive(:wait2).with(pid).and_return(wait_result)
     end
 
@@ -65,8 +67,7 @@
     end
 
     context "with no failures" do
-      it "spawns and waits" do
-        expect(Kernel).to receive(:spawn).with(cmd).and_return(pid)
+      it "waits for process to end" do
         expect(Process).to receive(:wait2).with(pid).and_return(wait_result)
         subject
       end
diff --git a/spec/lib/guard/rspec/runner_spec.rb b/spec/lib/guard/rspec/runner_spec.rb
index ff93e718..633ff046 100644
--- a/spec/lib/guard/rspec/runner_spec.rb
+++ b/spec/lib/guard/rspec/runner_spec.rb
@@ -191,6 +191,66 @@
       end
     end
 
+    context "with a custom results file" do
+      let(:options) do
+        { cmd: "rspec", results_file: results_file }.merge(chdir_options)
+      end
+
+      context "with no chdir option" do
+        let(:chdir_options) { {} }
+
+        context "when the path is relative" do
+          let(:results_file) { "foobar.txt" }
+          it "uses the given file" do
+            expect(Guard::RSpec::RSpecProcess).to receive(:new).
+              with(anything, results_file).and_return(process)
+            runner.run(paths)
+          end
+        end
+
+        context "when the path is absolute" do
+          let(:results_file) { "/foo/foobar.txt" }
+          it "uses the given path" do
+            expect(Guard::RSpec::RSpecProcess).to receive(:new).
+              with(anything, results_file).and_return(process)
+            runner.run(paths)
+          end
+        end
+      end
+
+      context "with chdir option" do
+        let(:chdir_options) { { chdir: "moduleA" } }
+
+        context "when the path is relative" do
+          let(:results_file) { "foobar.txt" }
+
+          it "uses a path relative to chdir" do
+            expect(Guard::RSpec::RSpecProcess).to receive(:new).
+              with(anything, "moduleA/foobar.txt").and_return(process)
+            runner.run(paths)
+          end
+        end
+
+        context "when the path is absolute" do
+          let(:results_file) { "/foo/foobar.txt" }
+          it "uses the full given path anyway" do
+            expect(Guard::RSpec::RSpecProcess).to receive(:new).
+              with(anything, results_file).and_return(process)
+            runner.run(paths)
+          end
+        end
+      end
+    end
+
+    context "with no custom results file" do
+      let(:options) { { cmd: "rspec" } }
+      it "uses the default" do
+        expect(Guard::RSpec::RSpecProcess).to receive(:new).
+          with(anything, "tmp/rspec_guard_result").and_return(process)
+        runner.run(paths)
+      end
+    end
+
     it "notifies inspector about failed paths" do
       expect(inspector).to receive(:failed).with([])
       runner.run(paths)
@@ -225,19 +285,4 @@
       runner.run(paths)
     end
   end
-
-  # TODO: remove / cleanup
-  describe "_tmp_file" do
-    subject { described_class.new.send(:_tmp_file, chdir) }
-
-    context "with no chdir option" do
-      let(:chdir) { nil }
-      it { is_expected.to eq("tmp/rspec_guard_result") }
-    end
-
-    context "chdir option" do
-      let(:chdir) { "moduleA" }
-      it { is_expected.to eq("moduleA/tmp/rspec_guard_result") }
-    end
-  end
 end
diff --git a/spec/lib/guard/rspec_formatter_spec.rb b/spec/lib/guard/rspec_formatter_spec.rb
index 4b3e9aab..103eaa04 100644
--- a/spec/lib/guard/rspec_formatter_spec.rb
+++ b/spec/lib/guard/rspec_formatter_spec.rb
@@ -1,11 +1,6 @@
 require "guard/rspec_formatter"
 
 RSpec.describe Guard::RSpecFormatter do
-  describe "::TEMPORARY_FILE_PATH" do
-    subject { Pathname.new(described_class::TEMPORARY_FILE_PATH) }
-    it { is_expected.to be_relative }
-  end
-
   describe "#dump_summary" do
     def rspec_summary_args(*args)
       return args unless ::RSpec::Core::Version::STRING.start_with?("3.")
@@ -53,8 +48,15 @@ def rspec_summary_args(*args)
     context "without stubbed IO" do
       let(:stub_formatter) { false }
 
+      around do |example|
+        env_var = "GUARD_RSPEC_RESULTS_FILE"
+        old, ENV[env_var] = ENV[env_var], "foobar.txt"
+        example.run
+        ENV[env_var] = old
+      end
+
       it "creates temporary file and and writes to it" do
-        file = File.expand_path(described_class::TEMPORARY_FILE_PATH)
+        file = File.expand_path("foobar.txt")
 
         expect(FileUtils).to receive(:mkdir_p).
           with(File.dirname(file)) {}