diff --git a/packages/BUILD.bazel b/packages/BUILD.bazel
index bfa0da546d3..50614852d01 100644
--- a/packages/BUILD.bazel
+++ b/packages/BUILD.bazel
@@ -65,6 +65,7 @@ rules_js_tsconfig(
     deps = [
         ":tsconfig_build",
         "//:node_modules/@types/jasmine",
+        "//:node_modules/@types/node",
     ],
 )
 
diff --git a/packages/service-worker/BUILD.bazel b/packages/service-worker/BUILD.bazel
index 98baece26dd..3ff9e17f346 100644
--- a/packages/service-worker/BUILD.bazel
+++ b/packages/service-worker/BUILD.bazel
@@ -13,15 +13,6 @@ rules_js_tsconfig(
     ],
 )
 
-rules_js_tsconfig(
-    name = "tsconfig_test",
-    src = "tsconfig-test.json",
-    deps = [
-        "//:node_modules/@types/node",
-        "//packages:tsconfig_test",
-    ],
-)
-
 ng_project(
     name = "service-worker",
     srcs = glob(
diff --git a/packages/service-worker/cli/BUILD.bazel b/packages/service-worker/cli/BUILD.bazel
index 29d4abd251b..87d901080ac 100644
--- a/packages/service-worker/cli/BUILD.bazel
+++ b/packages/service-worker/cli/BUILD.bazel
@@ -8,7 +8,6 @@ ts_project(
     srcs = glob(
         ["**/*.ts"],
     ),
-    tsconfig = "//packages/service-worker:tsconfig_build",
     deps = [
         "//packages/service-worker/config:config_rjs",
     ],
diff --git a/packages/service-worker/config/test/BUILD.bazel b/packages/service-worker/config/test/BUILD.bazel
index 74641191f65..f27e4b549c4 100644
--- a/packages/service-worker/config/test/BUILD.bazel
+++ b/packages/service-worker/config/test/BUILD.bazel
@@ -7,7 +7,6 @@ ts_project(
     srcs = glob(
         ["**/*.ts"],
     ),
-    tsconfig = "//packages/service-worker:tsconfig_test",
     deps = [
         "//packages/service-worker/config:config_rjs",
         "//packages/service-worker/config/testing:testing_rjs",
diff --git a/packages/service-worker/config/testing/BUILD.bazel b/packages/service-worker/config/testing/BUILD.bazel
index 1bf90e401b5..ccb13822888 100644
--- a/packages/service-worker/config/testing/BUILD.bazel
+++ b/packages/service-worker/config/testing/BUILD.bazel
@@ -9,7 +9,6 @@ ts_project(
     srcs = glob([
         "*.ts",
     ]),
-    tsconfig = "//packages/service-worker:tsconfig_build",
     deps = [
         "//packages/service-worker/cli:cli_rjs",
         "//packages/service-worker/config:config_rjs",
diff --git a/packages/service-worker/test/BUILD.bazel b/packages/service-worker/test/BUILD.bazel
index 2087283b333..b1a44588d88 100644
--- a/packages/service-worker/test/BUILD.bazel
+++ b/packages/service-worker/test/BUILD.bazel
@@ -13,7 +13,6 @@ ts_project(
         "//packages/service-worker",
         "//packages/service-worker/testing",
     ],
-    tsconfig = "//packages/service-worker:tsconfig_test",
     deps = [
         "//:node_modules/rxjs",
         "//packages:types_rjs",
diff --git a/packages/service-worker/testing/BUILD.bazel b/packages/service-worker/testing/BUILD.bazel
index 8ab91c05004..9b211555734 100644
--- a/packages/service-worker/testing/BUILD.bazel
+++ b/packages/service-worker/testing/BUILD.bazel
@@ -9,7 +9,6 @@ ng_project(
     interop_deps = [
         "//packages/core",
     ],
-    tsconfig = "//packages/service-worker:tsconfig_test",
     deps = [
         "//:node_modules/rxjs",
     ],
diff --git a/packages/service-worker/tsconfig-test.json b/packages/service-worker/tsconfig-test.json
deleted file mode 100644
index d17572ea074..00000000000
--- a/packages/service-worker/tsconfig-test.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "extends": "../tsconfig-test.json",
-  "compilerOptions": {
-    "types": ["node", "jasmine"]
-  }
-}
\ No newline at end of file
diff --git a/packages/service-worker/worker/BUILD.bazel b/packages/service-worker/worker/BUILD.bazel
index 7efdd89faca..ca955f19958 100644
--- a/packages/service-worker/worker/BUILD.bazel
+++ b/packages/service-worker/worker/BUILD.bazel
@@ -14,14 +14,11 @@ ts_project(
             "main.ts",
         ],
     ),
-    tsconfig = "//packages/service-worker:tsconfig_build",
-    deps = ["//:node_modules/@types/node"],
 )
 
 ts_project(
     name = "main",
     srcs = ["main.ts"],
-    tsconfig = "//packages/service-worker:tsconfig_build",
     deps = [":worker_rjs"],
 )
 
diff --git a/packages/service-worker/worker/test/BUILD.bazel b/packages/service-worker/worker/test/BUILD.bazel
index 08834e5d009..4df3eee69d5 100644
--- a/packages/service-worker/worker/test/BUILD.bazel
+++ b/packages/service-worker/worker/test/BUILD.bazel
@@ -7,7 +7,6 @@ ts_project(
     srcs = glob([
         "**/*.ts",
     ]),
-    tsconfig = "//packages/service-worker:tsconfig_test",
     deps = [
         "//packages:types_rjs",
         "//packages/service-worker/config:config_rjs",
diff --git a/packages/service-worker/worker/testing/BUILD.bazel b/packages/service-worker/worker/testing/BUILD.bazel
index 890ae330152..349856e189f 100644
--- a/packages/service-worker/worker/testing/BUILD.bazel
+++ b/packages/service-worker/worker/testing/BUILD.bazel
@@ -9,7 +9,6 @@ ts_project(
     interop_deps = [
         "//packages/core",
     ],
-    tsconfig = "//packages/service-worker:tsconfig_test",
     deps = [
         "//:node_modules/rxjs",
         "//:node_modules/typescript",
diff --git a/tools/defaults2.bzl b/tools/defaults2.bzl
index 682ae8bca88..5bf0498bfd8 100644
--- a/tools/defaults2.bzl
+++ b/tools/defaults2.bzl
@@ -8,6 +8,18 @@ load("//tools/bazel:ts_project_interop.bzl", _ts_project = "ts_project")
 npm_package = _npm_package
 ts_config = _ts_config
 
+def _determine_tsconfig(testonly):
+    if native.package_name().startswith("packages/compiler-cli/src/ngtsc"):
+        return "//packages/compiler-cli:tsconfig_test" if testonly else "//packages/compiler-cli:tsconfig_build"
+
+    if native.package_name().startswith("packages/service-worker"):
+        return "//packages:tsconfig_test" if testonly else "//packages/service-worker:tsconfig_build"
+
+    if native.package_name().startswith("packages"):
+        return "//packages:tsconfig_test" if testonly else "//packages:tsconfig_build"
+
+    fail("Failing... a tsconfig value must be provided.")
+
 def ts_project(
         name,
         source_map = True,
@@ -17,10 +29,7 @@ def ts_project(
     module_name = kwargs.pop("module_name", compute_module_name(testonly))
 
     if tsconfig == None:
-        if native.package_name().startswith("packages/compiler-cli/src/ngtsc"):
-            tsconfig = "//packages/compiler-cli:tsconfig_test" if testonly else "//packages/compiler-cli:tsconfig_build"
-        elif native.package_name().startswith("packages"):
-            tsconfig = "//packages:tsconfig_test" if testonly else "//packages:tsconfig_build"
+        tsconfig = _determine_tsconfig(testonly)
 
     _ts_project(
         name,
@@ -39,8 +48,9 @@ def ng_project(
         **kwargs):
     module_name = kwargs.pop("module_name", compute_module_name(testonly))
 
-    if tsconfig == None and native.package_name().startswith("packages"):
-        tsconfig = "//packages:tsconfig_test" if testonly else "//packages:tsconfig_build"
+    if tsconfig == None:
+        tsconfig = _determine_tsconfig(testonly)
+
     _ts_project(
         name,
         source_map = source_map,