diff --git a/create_builder_test.go b/create_builder_test.go
index 7244f1f4d7..063e1dcefe 100644
--- a/create_builder_test.go
+++ b/create_builder_test.go
@@ -439,7 +439,7 @@ func checkGroups(t *testing.T, groups []lifecycle.BuildpackGroup) {
 				Version: "1.2.3",
 			},
 			{
-				ID:      "some.bp2",
+				ID:      "some/bp2",
 				Version: "1.2.4",
 			},
 		}},
@@ -462,12 +462,12 @@ func checkBuildpacks(t *testing.T, buildpacks []pack.Buildpack) {
 			// Latest will default to false
 		},
 		{
-			ID:     "some.bp2",
+			ID:     "some/bp2",
 			Dir:    filepath.Join("testdata", "some-path-2"),
 			Latest: false,
 		},
 		{
-			ID:     "some.bp2",
+			ID:     "some/bp2",
 			Dir:    filepath.Join("testdata", "some-latest-path-2"),
 			Latest: true,
 		},
diff --git a/testdata/builder.toml b/testdata/builder.toml
index 4b3cc1671e..34d453365f 100644
--- a/testdata/builder.toml
+++ b/testdata/builder.toml
@@ -3,18 +3,18 @@ id = "some.bp1"
 uri = "some-path-1"
 
 [[buildpacks]]
-id = "some.bp2"
+id = "some/bp2"
 uri = "some-path-2"
 
 [[buildpacks]]
-id = "some.bp2"
+id = "some/bp2"
 uri = "some-latest-path-2"
 latest = true
 
 [[groups]]
 buildpacks = [
   { id = "some.bp1", version = "1.2.3" },
-  { id = "some.bp2", version = "1.2.4" },
+  { id = "some/bp2", version = "1.2.4" },
 ]
 
 [[groups]]