diff --git a/.swiftlint.yml b/.swiftlint.yml
index 56dce418..94fc2828 100644
--- a/.swiftlint.yml
+++ b/.swiftlint.yml
@@ -15,3 +15,6 @@ function_body_length: 50
 included:
   - Sources
   - Tests
+
+excluded:
+  - Tests/Fixtures/TestApp/.build
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
index 7568a1ca..ecb3258d 100644
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -31,57 +31,57 @@
     {
       "label": "build and run dev",
       "type": "shell",
-      "command": "swift build && cd TestApp && ../.build/debug/carton dev"
+      "command": "swift build && cd Tests/Fixtures/TestApp && ../../../.build/debug/carton dev"
     },
     {
       "label": "build and run dev release",
       "type": "shell",
-      "command": "swift build && cd TestApp && ../.build/debug/carton dev --release"
+      "command": "swift build && cd Tests/Fixtures/TestApp && ../../../.build/debug/carton dev --release"
     },
     {
       "label": "build release and run dev",
       "type": "shell",
-      "command": "swift build -c release && cd TestApp && ../.build/release/carton dev"
+      "command": "swift build -c release && cd Tests/Fixtures/TestApp && ../../../.build/release/carton dev"
     },
     {
       "label": "build release and run dev verbose",
       "type": "shell",
-      "command": "swift build -c release && cd TestApp && ../.build/release/carton dev -v"
+      "command": "swift build -c release && cd Tests/Fixtures/TestApp && ../../../.build/release/carton dev -v"
     },
     {
       "label": "build and run dev on 9090 port",
       "type": "shell",
-      "command": "swift build && cd TestApp && ../.build/debug/carton dev --port 9090"
+      "command": "swift build && cd Tests/Fixtures/TestApp && ../../../.build/debug/carton dev --port 9090"
     },
     {
       "label": "build and run dev w/ custom index",
       "type": "shell",
-      "command": "swift build && cd TestApp && ../.build/debug/carton dev --product TestApp --custom-index-page index.html"
+      "command": "swift build && cd Tests/Fixtures/TestApp && ../../../.build/debug/carton dev --product TestApp --custom-index-page index.html"
     },
     {
       "label": "build and run dev in subdirectory",
       "type": "shell",
-      "command": "swift build && cd TestApp/Sources/TestApp && ../../../.build/debug/carton dev --product TestApp"
+      "command": "swift build && cd Tests/Fixtures/TestApp/Sources/TestApp && ../../../.build/debug/carton dev --product TestApp"
     },
     {
       "label": "build and run test",
       "type": "shell",
-      "command": "swift build && cd TestApp && ../.build/debug/carton test"
+      "command": "swift build && cd Tests/Fixtures/TestApp && ../../../.build/debug/carton test"
     },
     {
       "label": "build and run browser test",
       "type": "shell",
-      "command": "swift build && cd TestApp && ../.build/debug/carton test --environment defaultBrowser"
+      "command": "swift build && cd Tests/Fixtures/TestApp && ../../../.build/debug/carton test --environment defaultBrowser"
     },
     {
       "label": "build and run test list",
       "type": "shell",
-      "command": "swift build && cd TestApp && ../.build/debug/carton test -l"
+      "command": "swift build && cd Tests/Fixtures/TestApp && ../../../.build/debug/carton test -l"
     },
     {
       "label": "build and run test case",
       "type": "shell",
-      "command": "swift build && cd TestApp && ../.build/debug/carton test Tests.Test/testTrivial"
+      "command": "swift build && cd Tests/Fixtures/TestApp && ../../../.build/debug/carton test Tests.Test/testTrivial"
     },
     {
       "label": "build and hash static dependencies",
@@ -91,22 +91,22 @@
     {
       "label": "build and run bundle",
       "type": "shell",
-      "command": "swift build && cd TestApp && ../.build/debug/carton bundle"
+      "command": "swift build && cd Tests/Fixtures/TestApp && ../../../.build/debug/carton bundle"
     },
     {
       "label": "build and run bundle debug",
       "type": "shell",
-      "command": "swift build && cd TestApp && ../.build/debug/carton bundle --debug"
+      "command": "swift build && cd Tests/Fixtures/TestApp && ../../../.build/debug/carton bundle --debug"
     },
     {
       "label": "build and run bundle, log to file",
       "type": "shell",
-      "command": "swift build && cd TestApp && ../.build/debug/carton bundle > .build/log"
+      "command": "swift build && cd Tests/Fixtures/TestApp && ../../../.build/debug/carton bundle > .build/log"
     },
     {
       "label": "build and run bundle w/ custom index",
       "type": "shell",
-      "command": "swift build && cd TestApp && ../.build/debug/carton bundle --custom-index-page index.html"
+      "command": "swift build && cd Tests/Fixtures/TestApp && ../../../.build/debug/carton bundle --custom-index-page index.html"
     },
     {
       "type": "npm",
diff --git a/Sources/CartonCLI/Commands/Test.swift b/Sources/CartonCLI/Commands/Test.swift
index 499b7f80..e3db460e 100644
--- a/Sources/CartonCLI/Commands/Test.swift
+++ b/Sources/CartonCLI/Commands/Test.swift
@@ -65,7 +65,7 @@ struct Test: ParsableCommand {
 
     try Self.entrypoint.check(on: localFileSystem, terminal)
     let toolchain = try Toolchain(localFileSystem, terminal)
-    let testBundlePath = try toolchain.buildTestBundle(isRelease: release)
+    let testBundlePath = try toolchain.buildTestBundle(isRelease: release, environment.destination)
 
     if environment == .wasmer {
       terminal.write("\nRunning the test bundle with wasmer:\n", inColor: .yellow)
diff --git a/Sources/SwiftToolchain/Toolchain.swift b/Sources/SwiftToolchain/Toolchain.swift
index 544942f3..6d20da08 100644
--- a/Sources/SwiftToolchain/Toolchain.swift
+++ b/Sources/SwiftToolchain/Toolchain.swift
@@ -242,7 +242,10 @@ public final class Toolchain {
   }
 
   /// Returns an absolute path to the resulting test bundle
-  public func buildTestBundle(isRelease: Bool) throws -> AbsolutePath {
+  public func buildTestBundle(
+    isRelease: Bool,
+    _ environment: DestinationEnvironment
+  ) throws -> AbsolutePath {
     let package = try self.package.get()
     let binPath = try inferBinPath(isRelease: isRelease)
     let testProductName = "\(package.name)PackageTests"
@@ -263,7 +266,7 @@ public final class Toolchain {
     try Builder(
       arguments: builderArguments,
       mainWasmPath: testBundlePath,
-      environment: .other,
+      environment: environment,
       fileSystem,
       terminal
     )
diff --git a/Tests/CartonCommandTests/TestCommandTests.swift b/Tests/CartonCommandTests/TestCommandTests.swift
index 4fca33c5..c9d2ae8b 100644
--- a/Tests/CartonCommandTests/TestCommandTests.swift
+++ b/Tests/CartonCommandTests/TestCommandTests.swift
@@ -24,10 +24,9 @@ extension TestCommandTests: Testable {}
 final class TestCommandTests: XCTestCase {
   func testWithNoArguments() throws {
     // given I've created a directory
-    let package = "TestApp"
-    let packageDirectory = testFixturesDirectory.appending(components: "carton-test", package)
+    let packageDirectory = testFixturesDirectory.appending(components: "TestApp")
 
-    XCTAssertTrue(packageDirectory.exists, "The carton-test/TestApp directory does not exist")
+    XCTAssertTrue(packageDirectory.exists, "The TestApp directory does not exist")
 
     AssertExecuteCommand(
       command: "carton test",
diff --git a/Tests/Fixtures/carton-test/TestApp/CustomPathTarget/text.swift b/Tests/Fixtures/TestApp/CustomPathTarget/text.swift
similarity index 100%
rename from Tests/Fixtures/carton-test/TestApp/CustomPathTarget/text.swift
rename to Tests/Fixtures/TestApp/CustomPathTarget/text.swift
diff --git a/Tests/Fixtures/carton-test/TestApp/Package.resolved b/Tests/Fixtures/TestApp/Package.resolved
similarity index 100%
rename from Tests/Fixtures/carton-test/TestApp/Package.resolved
rename to Tests/Fixtures/TestApp/Package.resolved
diff --git a/Tests/Fixtures/carton-test/TestApp/Package.swift b/Tests/Fixtures/TestApp/Package.swift
similarity index 100%
rename from Tests/Fixtures/carton-test/TestApp/Package.swift
rename to Tests/Fixtures/TestApp/Package.swift
diff --git a/Tests/Fixtures/carton-test/TestApp/Sources/TestApp/data.json b/Tests/Fixtures/TestApp/Sources/TestApp/data.json
similarity index 100%
rename from Tests/Fixtures/carton-test/TestApp/Sources/TestApp/data.json
rename to Tests/Fixtures/TestApp/Sources/TestApp/data.json
diff --git a/Tests/Fixtures/carton-test/TestApp/Sources/TestApp/main.swift b/Tests/Fixtures/TestApp/Sources/TestApp/main.swift
similarity index 100%
rename from Tests/Fixtures/carton-test/TestApp/Sources/TestApp/main.swift
rename to Tests/Fixtures/TestApp/Sources/TestApp/main.swift
diff --git a/Tests/Fixtures/carton-test/TestApp/Sources/TestLibrary/text.swift b/Tests/Fixtures/TestApp/Sources/TestLibrary/text.swift
similarity index 100%
rename from Tests/Fixtures/carton-test/TestApp/Sources/TestLibrary/text.swift
rename to Tests/Fixtures/TestApp/Sources/TestLibrary/text.swift
diff --git a/Tests/Fixtures/carton-test/TestApp/Tests/Tests/TrivialTest.swift b/Tests/Fixtures/TestApp/Tests/Tests/TrivialTest.swift
similarity index 100%
rename from Tests/Fixtures/carton-test/TestApp/Tests/Tests/TrivialTest.swift
rename to Tests/Fixtures/TestApp/Tests/Tests/TrivialTest.swift
diff --git a/Tests/Fixtures/carton-test/TestApp/index.html b/Tests/Fixtures/TestApp/index.html
similarity index 100%
rename from Tests/Fixtures/carton-test/TestApp/index.html
rename to Tests/Fixtures/TestApp/index.html