diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index 3eeac6be..ddfe7a32 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -69,6 +69,13 @@ jobs:
         with:
           terraform_version: "1.5.0"
           terraform_wrapper: false
+      - name: Install Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.4'
+      - name: Install Ruby language server
+        shell: bash
+        run: gem install solargraph
       - name: Install uv
         shell: bash
         run: curl -LsSf https://astral.sh/uv/install.sh | sh
diff --git a/pyproject.toml b/pyproject.toml
index 8872384c..d46c678f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -260,6 +260,7 @@ markers = [
   "elixir: language server running for Elixir",
   "terraform: language server running for Terraform",
   "snapshot: snapshot tests for symbolic editing operations",
+  "ruby: language server running for Ruby",
 ]
 
 [tool.codespell]
diff --git a/test/resources/repos/ruby/test_repo/.solargraph.yml b/test/resources/repos/ruby/test_repo/.solargraph.yml
new file mode 100644
index 00000000..b4678eec
--- /dev/null
+++ b/test/resources/repos/ruby/test_repo/.solargraph.yml
@@ -0,0 +1,4 @@
+---
+include:
+  - "main.rb"
+  - "lib.rb"
diff --git a/test/resources/repos/ruby/test_repo/lib.rb b/test/resources/repos/ruby/test_repo/lib.rb
new file mode 100644
index 00000000..5dd8504b
--- /dev/null
+++ b/test/resources/repos/ruby/test_repo/lib.rb
@@ -0,0 +1,9 @@
+class Calculator
+  def add(a, b)
+    a + b
+  end
+
+  def subtract(a, b)
+    a - b
+  end
+end
diff --git a/test/resources/repos/ruby/test_repo/main.rb b/test/resources/repos/ruby/test_repo/main.rb
new file mode 100644
index 00000000..dcf1b0f2
--- /dev/null
+++ b/test/resources/repos/ruby/test_repo/main.rb
@@ -0,0 +1,21 @@
+require './lib.rb'
+
+class DemoClass
+  attr_accessor :value
+
+  def initialize(value)
+    @value = value
+  end
+
+  def print_value
+    puts @value
+  end
+end
+
+def helper_function(number = 42)
+  demo = DemoClass.new(number)
+  Calculator.new.add(demo.value, 10)
+  demo.print_value
+end
+
+helper_function
diff --git a/test/solidlsp/ruby/test_ruby_basic.py b/test/solidlsp/ruby/test_ruby_basic.py
new file mode 100644
index 00000000..435c0538
--- /dev/null
+++ b/test/solidlsp/ruby/test_ruby_basic.py
@@ -0,0 +1,42 @@
+import os
+from pathlib import Path
+
+import pytest
+
+from solidlsp import SolidLanguageServer
+from solidlsp.ls_config import Language
+from solidlsp.ls_utils import SymbolUtils
+
+
+@pytest.mark.ruby
+class TestRubyLanguageServer:
+    @pytest.mark.parametrize("language_server", [Language.RUBY], indirect=True)
+    def test_find_symbol(self, language_server: SolidLanguageServer) -> None:
+        symbols = language_server.request_full_symbol_tree()
+        assert SymbolUtils.symbol_tree_contains_name(symbols, "DemoClass"), "DemoClass not found in symbol tree"
+        assert SymbolUtils.symbol_tree_contains_name(symbols, "helper_function"), "helper_function not found in symbol tree"
+        assert SymbolUtils.symbol_tree_contains_name(symbols, "print_value"), "print_value not found in symbol tree"
+
+    @pytest.mark.parametrize("language_server", [Language.RUBY], indirect=True)
+    def test_find_referencing_symbols(self, language_server: SolidLanguageServer) -> None:
+        file_path = os.path.join("main.rb")
+        symbols = language_server.request_document_symbols(file_path)
+        helper_symbol = None
+        for sym in symbols[0]:
+            if sym.get("name") == "helper_function":
+                helper_symbol = sym
+                break
+        print(helper_symbol)
+        assert helper_symbol is not None, "Could not find 'helper_function' symbol in main.rb"   
+
+    @pytest.mark.parametrize("language_server", [Language.RUBY], indirect=True)
+    @pytest.mark.parametrize("repo_path", [Language.RUBY], indirect=True)  
+    def test_find_definition_across_files(self, language_server: SolidLanguageServer, repo_path: Path) -> None:        
+        # Test finding Calculator.add method definition from line 17: Calculator.new.add(demo.value, 10)
+        definition_location_list = language_server.request_definition(str(repo_path / "main.rb"), 16,17)  # add method at line 17 (0-indexed 16), position 17
+           
+        assert len(definition_location_list) == 1
+        definition_location = definition_location_list[0]
+        print(f"Found definition: {definition_location}")
+        assert definition_location["uri"].endswith("lib.rb")
+        assert definition_location["range"]["start"]["line"] == 1  # add method on line 2 (0-indexed 1)