diff --git a/src/Runner.Worker/FileCommandManager.cs b/src/Runner.Worker/FileCommandManager.cs
index 5fdcb2377..b6251112c 100644
--- a/src/Runner.Worker/FileCommandManager.cs
+++ b/src/Runner.Worker/FileCommandManager.cs
@@ -38,7 +38,6 @@ namespace GitHub.Runner.Worker
 
             var extensionManager = hostContext.GetService<IExtensionManager>();
             _commandExtensions = extensionManager.GetExtensions<IFileCommandExtension>() ?? new List<IFileCommandExtension>();
-            
         }
 
         public void InitializeFiles(IExecutionContext context, ContainerInfo container)
@@ -131,10 +130,128 @@ namespace GitHub.Runner.Worker
 
         public void ProcessCommand(IExecutionContext context, string filePath, ContainerInfo container)
         {
-            if (File.Exists(filePath))
+            try
             {
-                // TODO Process this file
+                var text = File.ReadAllText(filePath) ?? string.Empty;
+                var index = 0;
+                var line = ReadLine(text, ref index);
+                while (line != null)
+                {
+                    if (!string.IsNullOrEmpty(line))
+                    {
+                        var equalsIndex = line.IndexOf("=", StringComparison.Ordinal);
+                        var heredocIndex = line.IndexOf("<<", StringComparison.Ordinal);
+
+                        // Normal style NAME=VALUE
+                        if (equalsIndex >= 0 && (heredocIndex < 0 || equalsIndex < heredocIndex))
+                        {
+                            var split = line.Split(new[] { '=' }, 2, StringSplitOptions.None);
+                            if (string.IsNullOrEmpty(line))
+                            {
+                                throw new Exception($"Invalid environment variable format '{line}'. Environment variable name must not be empty");
+                            }
+                            SetEnvironmentVariable(context, split[0], split[1]);
+                        }
+                        // Heredoc style NAME<<EOF
+                        else if (heredocIndex >= 0 && (equalsIndex < 0 || heredocIndex < equalsIndex))
+                        {
+                            var split = line.Split(new[] { "<<" }, 2, StringSplitOptions.None);
+                            if (string.IsNullOrEmpty(split[0]) || string.IsNullOrEmpty(split[1]))
+                            {
+                                throw new Exception($"Invalid environment variable format '{line}'. Environment variable name must not be empty and delimiter must not be empty");
+                            }
+                            var name = split[0];
+                            var delimiter = split[1];
+                            var startIndex = index; // Start index of the value (inclusive)
+                            var endIndex = index;   // End index of the value (exclusive)
+                            var tempLine = ReadLine(text, ref index, out var newline);
+                            while (!string.Equals(tempLine, delimiter, StringComparison.Ordinal))
+                            {
+                                if (tempLine == null)
+                                {
+                                    throw new Exception($"Invalid environment variable value. Matching delimiter not found '{delimiter}'");
+                                }
+                                endIndex = index - newline.Length;
+                                tempLine = ReadLine(text, ref index, out newline);
+                            }
+
+                            var value = endIndex > startIndex ? text.Substring(startIndex, endIndex - startIndex) : string.Empty;
+                            SetEnvironmentVariable(context, name, value);
+                        }
+                        else
+                        {
+                            throw new Exception($"Invalid environment variable format '{line}'");
+                        }
+                    }
+
+                    line = ReadLine(text, ref index);
+                }
             }
+            catch (DirectoryNotFoundException)
+            {
+                context.Debug($"Environment variables file does not exist '{filePath}'");
+            }
+            catch (FileNotFoundException)
+            {
+                context.Debug($"Environment variables file does not exist '{filePath}'");
+            }
+            catch (Exception ex)
+            {
+                context.Error($"Failed to read environment variables file '{filePath}'");
+                context.Error(ex);
+            }
+        }
+
+        private static void SetEnvironmentVariable(
+            IExecutionContext context,
+            string name,
+            string value)
+        {
+            context.Global.EnvironmentVariables[name] = value;
+            context.SetEnvContext(name, value);
+            context.Debug($"{name}='{value}'");
+        }
+
+        private static string ReadLine(
+            string text,
+            ref int index)
+        {
+            return ReadLine(text, ref index, out _);
+        }
+
+        private static string ReadLine(
+            string text,
+            ref int index,
+            out string newline)
+        {
+            if (index >= text.Length)
+            {
+                newline = null;
+                return null;
+            }
+
+            var originalIndex = index;
+            var lfIndex = text.IndexOf("\n", index, StringComparison.Ordinal);
+            if (lfIndex < 0)
+            {
+                index = text.Length;
+                newline = null;
+                return text.Substring(originalIndex);
+            }
+
+#if OS_WINDOWS
+            var crLFIndex = text.IndexOf("\r\n", index, StringComparison.Ordinal);
+            if (crLFIndex >= 0 && crLFIndex < lfIndex)
+            {
+                index = crLFIndex + 2; // Skip over CRLF
+                newline = "\r\n";
+                return text.Substring(originalIndex, crLFIndex - originalIndex);
+            }
+#endif
+
+            index = lfIndex + 1; // Skip over LF
+            newline = "\n";
+            return text.Substring(originalIndex, lfIndex - originalIndex);
         }
     }
 }
diff --git a/src/Runner.Worker/GitHubContext.cs b/src/Runner.Worker/GitHubContext.cs
index 0e4b6d472..4eb98f770 100644
--- a/src/Runner.Worker/GitHubContext.cs
+++ b/src/Runner.Worker/GitHubContext.cs
@@ -41,5 +41,17 @@ namespace GitHub.Runner.Worker
                 }
             }
         }
+
+        public GitHubContext ShallowCopy()
+        {
+            var copy = new GitHubContext();
+
+            foreach (var pair in this)
+            {
+                copy[pair.Key] = pair.Value;
+            }
+
+            return copy;
+        }
     }
 }
\ No newline at end of file
diff --git a/src/Runner.Worker/Handlers/CompositeActionHandler.cs b/src/Runner.Worker/Handlers/CompositeActionHandler.cs
index 254277112..d7f92b0c0 100644
--- a/src/Runner.Worker/Handlers/CompositeActionHandler.cs
+++ b/src/Runner.Worker/Handlers/CompositeActionHandler.cs
@@ -32,9 +32,6 @@ namespace GitHub.Runner.Worker.Handlers
             ArgUtil.NotNull(Inputs, nameof(Inputs));
             ArgUtil.NotNull(Data.Steps, nameof(Data.Steps));
 
-            var githubContext = ExecutionContext.ExpressionValues["github"] as GitHubContext;
-            ArgUtil.NotNull(githubContext, nameof(githubContext));
-
             // Resolve action steps
             var actionSteps = Data.Steps;
 
@@ -56,14 +53,6 @@ namespace GitHub.Runner.Worker.Handlers
                 childScopeName = $"__{Guid.NewGuid()}";
             }
 
-            // Copy the github context so that we don't modify the original pointer
-            // We can't use PipelineContextData.Clone() since that creates a null pointer exception for copying a GitHubContext
-            var compositeGitHubContext = new GitHubContext();
-            foreach (var pair in githubContext)
-            {
-                compositeGitHubContext[pair.Key] = pair.Value;
-            }
-
             foreach (Pipelines.ActionStep actionStep in actionSteps)
             {
                 var actionRunner = HostContext.CreateService<IActionRunner>();
@@ -73,8 +62,13 @@ namespace GitHub.Runner.Worker.Handlers
 
                 var step = ExecutionContext.CreateCompositeStep(childScopeName, actionRunner, inputsData, Environment);
 
+                // Shallow copy github context
+                var gitHubContext = step.ExecutionContext.ExpressionValues["github"] as GitHubContext;
+                ArgUtil.NotNull(gitHubContext, nameof(gitHubContext));
+                gitHubContext = gitHubContext.ShallowCopy();
+                step.ExecutionContext.ExpressionValues["github"] = gitHubContext;
+
                 // Set GITHUB_ACTION_PATH
-                step.ExecutionContext.ExpressionValues["github"] = compositeGitHubContext;
                 step.ExecutionContext.SetGitHubContext("action_path", ActionDirectory);
 
                 compositeSteps.Add(step);
diff --git a/src/Runner.Worker/StepsRunner.cs b/src/Runner.Worker/StepsRunner.cs
index 58845206b..c0ab4f339 100644
--- a/src/Runner.Worker/StepsRunner.cs
+++ b/src/Runner.Worker/StepsRunner.cs
@@ -103,6 +103,12 @@ namespace GitHub.Runner.Worker
                 bool evaluateStepEnvFailed = false;
                 if (step is IActionRunner actionStep)
                 {
+                    // Shallow copy github context
+                    var gitHubContext = step.ExecutionContext.ExpressionValues["github"] as GitHubContext;
+                    ArgUtil.NotNull(gitHubContext, nameof(gitHubContext));
+                    gitHubContext = gitHubContext.ShallowCopy();
+                    step.ExecutionContext.ExpressionValues["github"] = gitHubContext;
+
                     // Set GITHUB_ACTION
                     step.ExecutionContext.SetGitHubContext("action", actionStep.Action.Name);
 
diff --git a/src/Test/L0/Worker/SetEnvFileCommandL0.cs b/src/Test/L0/Worker/SetEnvFileCommandL0.cs
new file mode 100644
index 000000000..c655fb676
--- /dev/null
+++ b/src/Test/L0/Worker/SetEnvFileCommandL0.cs
@@ -0,0 +1,390 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Runtime.CompilerServices;
+using GitHub.Runner.Common.Util;
+using GitHub.Runner.Sdk;
+using GitHub.Runner.Worker;
+using GitHub.Runner.Worker.Container;
+using GitHub.Runner.Worker.Handlers;
+using Moq;
+using Xunit;
+using DTWebApi = GitHub.DistributedTask.WebApi;
+
+namespace GitHub.Runner.Common.Tests.Worker
+{
+    public sealed class SetEnvFileCommandL0
+    {
+        private Mock<IExecutionContext> _executionContext;
+        private List<Tuple<DTWebApi.Issue, string>> _issues;
+        private string _rootDirectory;
+        private SetEnvFileCommand _setEnvFileCommand;
+        private ITraceWriter _trace;
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_DirectoryNotFound()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "directory-not-found", "env");
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(0, _executionContext.Object.Global.EnvironmentVariables.Count);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_NotFound()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "file-not-found");
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(0, _executionContext.Object.Global.EnvironmentVariables.Count);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_EmptyFile()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "empty-file");
+                var content = new List<string>();
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(0, _executionContext.Object.Global.EnvironmentVariables.Count);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Simple()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "simple");
+                var content = new List<string>
+                {
+                    "MY_ENV=MY VALUE",
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(1, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal("MY VALUE", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Simple_SkipEmptyLines()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "simple");
+                var content = new List<string>
+                {
+                    string.Empty,
+                    "MY_ENV=my value",
+                    string.Empty,
+                    "MY_ENV_2=my second value",
+                    string.Empty,
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(2, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal("my value", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+                Assert.Equal("my second value", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_2"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Simple_EmptyValue()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "simple-empty-value");
+                var content = new List<string>
+                {
+                    "MY_ENV=",
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(1, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal(string.Empty, _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Simple_MultipleValues()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "simple");
+                var content = new List<string>
+                {
+                    "MY_ENV=my value",
+                    "MY_ENV_2=",
+                    "MY_ENV_3=my third value",
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(3, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal("my value", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+                Assert.Equal(string.Empty, _executionContext.Object.Global.EnvironmentVariables["MY_ENV_2"]);
+                Assert.Equal("my third value", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_3"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Simple_SpecialCharacters()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "simple");
+                var content = new List<string>
+                {
+                    "MY_ENV==abc",
+                    "MY_ENV_2=def=ghi",
+                    "MY_ENV_3=jkl=",
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(3, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal("=abc", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+                Assert.Equal("def=ghi", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_2"]);
+                Assert.Equal("jkl=", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_3"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Heredoc()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "heredoc");
+                var content = new List<string>
+                {
+                    "MY_ENV<<EOF",
+                    "line one",
+                    "line two",
+                    "line three",
+                    "EOF",
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(1, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal($"line one{Environment.NewLine}line two{Environment.NewLine}line three", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Heredoc_EmptyValue()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "heredoc");
+                var content = new List<string>
+                {
+                    "MY_ENV<<EOF",
+                    "EOF",
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(1, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal(string.Empty, _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Heredoc_SkipEmptyLines()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "heredoc");
+                var content = new List<string>
+                {
+                    string.Empty,
+                    "MY_ENV<<EOF",
+                    "hello",
+                    "world",
+                    "EOF",
+                    string.Empty,
+                    "MY_ENV_2<<EOF",
+                    "HELLO",
+                    "AGAIN",
+                    "EOF",
+                    string.Empty,
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(2, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal($"hello{Environment.NewLine}world", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+                Assert.Equal($"HELLO{Environment.NewLine}AGAIN", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_2"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Heredoc_SpecialCharacters()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "heredoc");
+                var content = new List<string>
+                {
+                    "MY_ENV<<=EOF",
+                    "hello",
+                    "one",
+                    "=EOF",
+                    "MY_ENV_2<<<EOF",
+                    "hello",
+                    "two",
+                    "<EOF",
+                    "MY_ENV_3<<EOF",
+                    "hello",
+                    string.Empty,
+                    "three",
+                    string.Empty,
+                    "EOF",
+                    "MY_ENV_4<<EOF",
+                    "hello=four",
+                    "EOF",
+                    "MY_ENV_5<<EOF",
+                    " EOF",
+                    "EOF",
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(5, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal($"hello{Environment.NewLine}one", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+                Assert.Equal($"hello{Environment.NewLine}two", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_2"]);
+                Assert.Equal($"hello{Environment.NewLine}{Environment.NewLine}three{Environment.NewLine}", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_3"]);
+                Assert.Equal($"hello=four", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_4"]);
+                Assert.Equal($" EOF", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_5"]);
+            }
+        }
+
+#if OS_WINDOWS
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Heredoc_PreservesNewline()
+        {
+            using (var hostContext = Setup())
+            {
+                var newline = "\n";
+                var envFile = Path.Combine(_rootDirectory, "heredoc");
+                var content = new List<string>
+                {
+                    "MY_ENV<<EOF",
+                    "hello",
+                    "world",
+                    "EOF",
+                };
+                WriteContent(envFile, content, newline: newline);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(1, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal($"hello{newline}world", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+            }
+        }
+#endif
+
+        private void WriteContent(
+            string path,
+            List<string> content,
+            string newline = null)
+        {
+            if (string.IsNullOrEmpty(newline))
+            {
+                newline = Environment.NewLine;
+            }
+
+            var encoding = new UTF8Encoding(true); // Emit BOM
+            var contentStr = string.Join(newline, content);
+            File.WriteAllText(path, contentStr, encoding);
+        }
+
+        private TestHostContext Setup([CallerMemberName] string name = "")
+        {
+            _issues = new List<Tuple<DTWebApi.Issue, string>>();
+
+            var hostContext = new TestHostContext(this, name);
+
+            // Trace
+            _trace = hostContext.GetTrace();
+
+            // Directory for test data
+            var workDirectory = hostContext.GetDirectory(WellKnownDirectory.Work);
+            ArgUtil.NotNullOrEmpty(workDirectory, nameof(workDirectory));
+            Directory.CreateDirectory(workDirectory);
+            _rootDirectory = Path.Combine(workDirectory, nameof(SetEnvFileCommandL0));
+            Directory.CreateDirectory(_rootDirectory);
+
+            // Execution context
+            _executionContext = new Mock<IExecutionContext>();
+            _executionContext.Setup(x => x.Global)
+                .Returns(new GlobalContext
+                {
+                    EnvironmentVariables = new Dictionary<string, string>(VarUtil.EnvironmentVariableKeyComparer),
+                    WriteDebug = true,
+                });
+            _executionContext.Setup(x => x.AddIssue(It.IsAny<DTWebApi.Issue>(), It.IsAny<string>()))
+                .Callback((DTWebApi.Issue issue, string logMessage) =>
+                {
+                    _issues.Add(new Tuple<DTWebApi.Issue, string>(issue, logMessage));
+                    var message = !string.IsNullOrEmpty(logMessage) ? logMessage : issue.Message;
+                    _trace.Info($"Issue '{issue.Type}': {message}");
+                });
+            _executionContext.Setup(x => x.Write(It.IsAny<string>(), It.IsAny<string>()))
+                .Callback((string tag, string message) =>
+                {
+                    _trace.Info($"{tag}{message}");
+                });
+
+            // SetEnvFileCommand
+            _setEnvFileCommand = new SetEnvFileCommand();
+            _setEnvFileCommand.Initialize(hostContext);
+
+            return hostContext;
+        }
+    }
+}
diff --git a/src/Test/L0/Worker/StepsRunnerL0.cs b/src/Test/L0/Worker/StepsRunnerL0.cs
index 3d97b0110..86843a083 100644
--- a/src/Test/L0/Worker/StepsRunnerL0.cs
+++ b/src/Test/L0/Worker/StepsRunnerL0.cs
@@ -44,7 +44,7 @@ namespace GitHub.Runner.Common.Tests.Worker
 
             _contexts = new DictionaryContextData();
             _jobContext = new JobContext();
-            _contexts["github"] = new DictionaryContextData();
+            _contexts["github"] = new GitHubContext();
             _contexts["runner"] = new DictionaryContextData();
             _contexts["job"] = _jobContext;
             _ec.Setup(x => x.ExpressionValues).Returns(_contexts);
@@ -602,7 +602,12 @@ namespace GitHub.Runner.Common.Tests.Worker
             var stepContext = new Mock<IExecutionContext>();
             stepContext.SetupAllProperties();
             stepContext.Setup(x => x.Global).Returns(() => _ec.Object.Global);
-            stepContext.Setup(x => x.ExpressionValues).Returns(new DictionaryContextData());
+            var expressionValues = new DictionaryContextData();
+            foreach (var pair in _ec.Object.ExpressionValues)
+            {
+                expressionValues[pair.Key] = pair.Value;
+            }
+            stepContext.Setup(x => x.ExpressionValues).Returns(expressionValues);
             stepContext.Setup(x => x.ExpressionFunctions).Returns(new List<IFunctionInfo>());
             stepContext.Setup(x => x.JobContext).Returns(_jobContext);
             stepContext.Setup(x => x.ContextName).Returns(step.Object.Action.ContextName);