diff --git a/TestAssets/TestProjects/LibraryWithUnresolvablePackageReference/LibraryWithUnresolvablePackageReference.csproj b/TestAssets/TestProjects/LibraryWithUnresolvablePackageReference/LibraryWithUnresolvablePackageReference.csproj
new file mode 100755
index 000000000..66c164859
--- /dev/null
+++ b/TestAssets/TestProjects/LibraryWithUnresolvablePackageReference/LibraryWithUnresolvablePackageReference.csproj
@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard1.5</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+  	<PackageReference Include="Something.Nonexistent" Version="1.1.1" />
+  </ItemGroup>
+
+</Project>
diff --git a/src/dotnet/commands/dotnet-msbuild/MSBuildForwardingApp.cs b/src/dotnet/commands/dotnet-msbuild/MSBuildForwardingApp.cs
index 5b5e68232..6b2b0f47f 100644
--- a/src/dotnet/commands/dotnet-msbuild/MSBuildForwardingApp.cs
+++ b/src/dotnet/commands/dotnet-msbuild/MSBuildForwardingApp.cs
@@ -41,10 +41,11 @@ namespace Microsoft.DotNet.Tools.MSBuild
                 {
                     Type loggerType = typeof(MSBuildLogger);
 
-                    argsToForward = argsToForward.Concat(new[]
-                    {
-                        $"/Logger:{loggerType.FullName},{loggerType.GetTypeInfo().Assembly.Location}"
-                    });
+                    argsToForward = argsToForward
+                        .Concat(new[]
+                        {
+                            $"/Logger:{loggerType.FullName},{loggerType.GetTypeInfo().Assembly.Location}"
+                        });
                 }
                 catch (Exception)
                 {
@@ -54,7 +55,7 @@ namespace Microsoft.DotNet.Tools.MSBuild
 
             _forwardingApp = new ForwardingApp(
                 GetMSBuildExePath(),
-                _msbuildRequiredParameters.Concat(argsToForward),
+                _msbuildRequiredParameters.Concat(argsToForward.Select(Escape)),
                 environmentVariables: _msbuildRequiredEnvironmentVariables);
         }
 
@@ -77,6 +78,13 @@ namespace Microsoft.DotNet.Tools.MSBuild
             return app.Option("-v|--verbosity", LocalizableStrings.VerbosityOptionDescription, CommandOptionType.SingleValue);
         }
 
+        private static string Escape(string arg) =>
+            // this is a workaround for https://github.com/Microsoft/msbuild/issues/1622
+             (arg.StartsWith("/p:RestoreSources=", StringComparison.OrdinalIgnoreCase)) ?
+                arg.Replace(";", "%3B") 
+                   .Replace("://", ":%2F%2F") : 
+                arg;
+
         private static string GetMSBuildExePath()
         {
             return Path.Combine(
diff --git a/test/dotnet-msbuild.Tests/GivenDotnetMSBuildBuildsProjects.cs b/test/dotnet-msbuild.Tests/GivenDotnetMSBuildBuildsProjects.cs
index dde27668c..117f34bae 100644
--- a/test/dotnet-msbuild.Tests/GivenDotnetMSBuildBuildsProjects.cs
+++ b/test/dotnet-msbuild.Tests/GivenDotnetMSBuildBuildsProjects.cs
@@ -5,18 +5,27 @@ using System;
 using System.Linq;
 using System.Linq.Expressions;
 using System.Reflection;
+using System.Runtime.InteropServices;
 using FluentAssertions;
 using Microsoft.DotNet.Configurer;
 using Microsoft.DotNet.Tools.MSBuild;
 using Microsoft.DotNet.Tools.Test.Utilities;
 using NuGet.Protocol;
 using Xunit;
+using Xunit.Abstractions;
 using MSBuildCommand = Microsoft.DotNet.Tools.Test.Utilities.MSBuildCommand;
 
 namespace Microsoft.DotNet.Cli.MSBuild.Tests
 {
     public class GivenDotnetMSBuildBuildsProjects : TestBase
     {
+        private readonly ITestOutputHelper _output;
+
+        public GivenDotnetMSBuildBuildsProjects(ITestOutputHelper output)
+        {
+            _output = output;
+        }
+
         [Fact]
         public void ItRunsSpecifiedTargetsWithPropertiesCorrectly()
         {
@@ -76,6 +85,37 @@ namespace Microsoft.DotNet.Cli.MSBuild.Tests
             }
         }
 
+        [Fact]
+        public void WhenRestoreSourcesStartsWithUnixPathThenHttpsSourceIsParsedCorrectly()
+        {
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+            {
+                return;
+            }
+
+            // this is a workaround for https://github.com/Microsoft/msbuild/issues/1622
+            var testInstance = TestAssets.Get("LibraryWithUnresolvablePackageReference")
+                                        .CreateInstance()
+                                        .WithSourceFiles();
+
+            var root = testInstance.Root;
+            var somePathThatExists = "/usr/local/bin";
+
+            var result = new DotnetCommand()
+                .WithWorkingDirectory(root)
+                .Execute($"msbuild /p:RestoreSources={somePathThatExists};https://api.nuget.org/v3/index.json /t:restore LibraryWithUnresolvablePackageReference.csproj");
+
+            _output.WriteLine($"[STDOUT]\n{result.StdOut}\n[STDERR]\n{result.StdErr}");
+
+            result.Should().Fail();
+
+            result.StdOut.Should()
+                         .ContainVisuallySameFragment(
+@"Feeds used:
+      /usr/local/bin
+      https://api.nuget.org/v3/index.json");
+        }
+
         [Fact]
         public void WhenDotnetRunHelpIsInvokedAppArgumentsTextIsIncludedInOutput()
         {
@@ -85,7 +125,7 @@ namespace Microsoft.DotNet.Cli.MSBuild.Tests
             var result = new TestCommand("dotnet")
                 .WithWorkingDirectory(projectDirectory.Path)
                 .ExecuteWithCapturedOutput("run --help");
-            
+
             result.ExitCode.Should().Be(0);
             result.StdOut.Should().Contain(AppArgumentsText);
         }
diff --git a/test/dotnet.Tests/PackagedCommandTests.cs b/test/dotnet.Tests/PackagedCommandTests.cs
index d1f8b0c93..52d58a9e7 100644
--- a/test/dotnet.Tests/PackagedCommandTests.cs
+++ b/test/dotnet.Tests/PackagedCommandTests.cs
@@ -41,7 +41,6 @@ namespace Microsoft.DotNet.Tests
                 };
             }
         }
-
         public static IEnumerable<object[]> LibraryDependencyToolArguments
         {
             get