diff --git a/npm_and_yarn/spec/dependabot/npm_and_yarn/update_checker_spec.rb b/npm_and_yarn/spec/dependabot/npm_and_yarn/update_checker_spec.rb
index 28282c85f7..470551ae74 100644
--- a/npm_and_yarn/spec/dependabot/npm_and_yarn/update_checker_spec.rb
+++ b/npm_and_yarn/spec/dependabot/npm_and_yarn/update_checker_spec.rb
@@ -34,14 +34,7 @@
   end
   let(:ignored_versions) { [] }
   let(:security_advisories) { [] }
-  let(:dependency_files) { [package_json] }
-  let(:package_json) do
-    Dependabot::DependencyFile.new(
-      name: "package.json",
-      content: fixture("package_files", manifest_fixture_name)
-    )
-  end
-  let(:manifest_fixture_name) { "package.json" }
+  let(:dependency_files) { project_dependency_files("npm6/no_lockfile") }
 
   let(:credentials) do
     [{
@@ -67,7 +60,7 @@
 
   describe "#up_to_date?", :vcr do
     context "with no lockfile" do
-      let(:manifest_fixture_name) { "peer_dependency_typescript.json" }
+      let(:dependency_files) { project_dependency_files("npm6/peer_dependency_typescript_no_lockfile") }
       let(:dependency) do
         Dependabot::Dependency.new(
           name: "typescript",
@@ -188,6 +181,7 @@
   end
 
   describe "#latest_version" do
+    let(:dependency_files) { project_dependency_files("npm6/no_lockfile") }
     subject { checker.latest_version }
 
     it "delegates to LatestVersionFinder" do
@@ -519,6 +513,7 @@
     subject { checker.latest_resolvable_version_with_no_unlock }
 
     context "with a non-git dependency" do
+      let(:dependency_files) { project_dependency_files("npm6/no_lockfile") }
       let(:dependency) do
         Dependabot::Dependency.new(
           name: "etag",
@@ -661,6 +656,7 @@
   end
 
   describe "#latest_resolvable_previous_version" do
+    let(:dependency_files) { project_dependency_files("npm6/no_lockfile") }
     let(:updated_version) { Gem::Version.new("1.7.0") }
     subject(:latest_resolvable_previous_version) do
       checker.latest_resolvable_previous_version(updated_version)
@@ -803,7 +799,7 @@
     context "with a library (that has a lockfile)" do
       # We've already stubbed hitting the registry for etag (since it's also
       # the dependency we're checking in this spec)
-      let(:manifest_fixture_name) { "etag.json" }
+      let(:dependency_files) { project_dependency_files("npm6/etag_no_lockfile") }
 
       it "delegates to the RequirementsUpdater" do
         expect(described_class::RequirementsUpdater).
@@ -990,7 +986,7 @@
     end
 
     context "updating a deprecated dependency with a peer requirement" do
-      let(:manifest_fixture_name) { "peer_dependency.json" }
+      let(:dependency_files) { project_dependency_files("npm6/peer_dependency_no_lockfile") }
       let(:registry_listing_url) { "https://registry.npmjs.org/react-dom" }
       let(:registry_response) do
         fixture("npm_responses", "peer_dependency_deprecated.json")
@@ -1038,6 +1034,7 @@
   end
 
   context "#updated_dependencies_after_full_unlock" do
+    let(:dependency_files) { project_dependency_files("npm6/no_lockfile") }
     let(:dependency) do
       Dependabot::Dependency.new(
         name: "etag",
diff --git a/npm_and_yarn/spec/fixtures/projects/npm6/etag_no_lockfile/package.json b/npm_and_yarn/spec/fixtures/projects/npm6/etag_no_lockfile/package.json
new file mode 100644
index 0000000000..3b3156d94a
--- /dev/null
+++ b/npm_and_yarn/spec/fixtures/projects/npm6/etag_no_lockfile/package.json
@@ -0,0 +1,44 @@
+{
+  "name": "etag",
+  "description": "Create simple ETags",
+  "version": "1.8.0",
+  "contributors": [
+    "Douglas Christopher Wilson <doug@somethingdoug.com>",
+    "David Björklund <david.bjorklund@gmail.com>"
+  ],
+  "license": "MIT",
+  "keywords": [
+    "etag",
+    "http",
+    "res"
+  ],
+  "repository": "jshttp/etag",
+  "devDependencies": {
+    "beautify-benchmark": "0.2.4",
+    "benchmark": "2.1.3",
+    "eslint": "3.15.0",
+    "eslint-config-standard": "6.2.1",
+    "eslint-plugin-markdown": "1.0.0-beta.3",
+    "eslint-plugin-promise": "3.4.2",
+    "eslint-plugin-standard": "2.0.1",
+    "istanbul": "0.4.5",
+    "mocha": "1.21.5",
+    "seedrandom": "2.4.2"
+  },
+  "files": [
+    "LICENSE",
+    "HISTORY.md",
+    "README.md",
+    "index.js"
+  ],
+  "engines": {
+    "node": ">= 0.6"
+  },
+  "scripts": {
+    "bench": "node benchmark/index.js",
+    "lint": "eslint --plugin markdown --ext js,md .",
+    "test": "mocha --reporter spec --bail --check-leaks test/",
+    "test-cov": "istanbul cover node_modules/mocha/bin/_mocha -- --reporter dot --check-leaks test/",
+    "test-travis": "istanbul cover node_modules/mocha/bin/_mocha --report lcovonly -- --reporter spec --check-leaks test/"
+  }
+}
diff --git a/npm_and_yarn/spec/fixtures/projects/npm6/peer_dependency_typescript_no_lockfile/package.json b/npm_and_yarn/spec/fixtures/projects/npm6/peer_dependency_typescript_no_lockfile/package.json
new file mode 100644
index 0000000000..67ba45d345
--- /dev/null
+++ b/npm_and_yarn/spec/fixtures/projects/npm6/peer_dependency_typescript_no_lockfile/package.json
@@ -0,0 +1,23 @@
+{
+    "name": "test",
+    "version": "1.0.0",
+    "description": "",
+    "main": "index.js",
+    "scripts": {
+        "test": "echo \"Error: no test specified\" && exit 1"
+    },
+    "repository": {
+        "type": "git",
+        "url": "git+https://github.com/waltfy/PROTO_TEST.git"
+    },
+    "author": "",
+    "license": "ISC",
+    "bugs": {
+        "url": "https://github.com/waltfy/PROTO_TEST/issues"
+    },
+    "homepage": "https://github.com/waltfy/PROTO_TEST#readme",
+    "dependencies": {
+	"@angular/compiler-cli": "^9.0.0",
+	"typescript": "3.7"
+    }
+}