diff --git a/bundler/helpers/v1/spec/native_spec_helper.rb b/bundler/helpers/v1/spec/native_spec_helper.rb
index af5346b916e..22a61acb71b 100644
--- a/bundler/helpers/v1/spec/native_spec_helper.rb
+++ b/bundler/helpers/v1/spec/native_spec_helper.rb
@@ -27,6 +27,9 @@
 
 def project_dependency_files(project)
   project_path = File.expand_path(File.join("../../spec/fixtures/projects/bundler1", project))
+
+  raise "Fixture does not exist for project: '#{project}'" unless Dir.exist?(project_path)
+
   Dir.chdir(project_path) do
     # NOTE: Include dotfiles (e.g. .npmrc)
     files = Dir.glob("**/*", File::FNM_DOTMATCH)
diff --git a/bundler/helpers/v2/spec/native_spec_helper.rb b/bundler/helpers/v2/spec/native_spec_helper.rb
index af5346b916e..c0be80f4214 100644
--- a/bundler/helpers/v2/spec/native_spec_helper.rb
+++ b/bundler/helpers/v2/spec/native_spec_helper.rb
@@ -26,7 +26,11 @@
 LOCKFILE_ENDING = /(?<ending>\s*(?:RUBY VERSION|BUNDLED WITH).*)/m.freeze
 
 def project_dependency_files(project)
+  # TODO: Retrieve files from bundler2 folder once it is fully up to date
   project_path = File.expand_path(File.join("../../spec/fixtures/projects/bundler1", project))
+
+  raise "Fixture does not exist for project: '#{project}'" unless Dir.exist?(project_path)
+
   Dir.chdir(project_path) do
     # NOTE: Include dotfiles (e.g. .npmrc)
     files = Dir.glob("**/*", File::FNM_DOTMATCH)
diff --git a/common/spec/spec_helper.rb b/common/spec/spec_helper.rb
index 4b8e77d3d09..1f228069849 100644
--- a/common/spec/spec_helper.rb
+++ b/common/spec/spec_helper.rb
@@ -93,6 +93,9 @@ def build_tmp_repo(project)
 
 def project_dependency_files(project)
   project_path = File.expand_path(File.join("spec/fixtures/projects", project))
+
+  raise "Fixture does not exist for project: '#{project}'" unless Dir.exist?(project_path)
+
   Dir.chdir(project_path) do
     # NOTE: Include dotfiles (e.g. .npmrc)
     files = Dir.glob("**/*", File::FNM_DOTMATCH)