diff --git a/autoload/ale/ruby.vim b/autoload/ale/ruby.vim
index f0d84296..5f0aa50d 100644
--- a/autoload/ale/ruby.vim
+++ b/autoload/ale/ruby.vim
@@ -29,7 +29,7 @@ function! ale#ruby#FindProjectRoot(buffer) abort
       return l:dir
     endif
 
-    for l:name in ['Rakefile', 'Gemfile']
+    for l:name in ['.solargraph.yml', 'Rakefile', 'Gemfile']
         let l:dir = fnamemodify(
         \   ale#path#FindNearestFile(a:buffer, l:name),
         \   ':h'
diff --git a/test/command_callback/test_ruby_solargraph.vader b/test/command_callback/test_ruby_solargraph.vader
index a27cb62d..b9dd46d8 100644
--- a/test/command_callback/test_ruby_solargraph.vader
+++ b/test/command_callback/test_ruby_solargraph.vader
@@ -27,3 +27,10 @@ Execute(should set solargraph for ruby app2):
   AssertLSPOptions {}
   AssertLSPProject ale#path#Simplify(g:dir . 'command_callback/../ruby_fixtures/valid_ruby_app2')
   AssertLSPAddress '127.0.0.1:7658'
+
+Execute(should set solargraph for ruby app3):
+  call ale#test#SetFilename('../ruby_fixtures/valid_ruby_app3/lib/file.rb')
+  AssertLSPLanguage 'ruby'
+  AssertLSPOptions {}
+  AssertLSPProject ale#path#Simplify(g:dir . 'command_callback/../ruby_fixtures/valid_ruby_app3')
+  AssertLSPAddress '127.0.0.1:7658'
diff --git a/test/ruby_fixtures/valid_ruby_app3/.solargraph.yml b/test/ruby_fixtures/valid_ruby_app3/.solargraph.yml
new file mode 100644
index 00000000..e69de29b
diff --git a/test/ruby_fixtures/valid_ruby_app3/lib/file.rb b/test/ruby_fixtures/valid_ruby_app3/lib/file.rb
new file mode 100644
index 00000000..e69de29b