diff --git a/nuget/lib/dependabot/nuget/file_parser.rb b/nuget/lib/dependabot/nuget/file_parser.rb
index 583cb5d5a09..d3395d796b1 100644
--- a/nuget/lib/dependabot/nuget/file_parser.rb
+++ b/nuget/lib/dependabot/nuget/file_parser.rb
@@ -21,13 +21,13 @@ class FileParser < Dependabot::FileParsers::Base
       def parse
         workspace_path = project_files.first&.directory
         return [] unless workspace_path
-
+        return [] unless repo_contents_path
         # `workspace_path` is the only unique value here so we use it as the cache key
         cache = T.let(CacheManager.cache("file_parser.parse"), T::Hash[String, T::Array[Dependabot::Dependency]])
         key = workspace_path
         cache[key] ||= begin
           # run discovery for the repo
-          NativeHelpers.run_nuget_discover_tool(repo_root: repo_contents_path,
+          NativeHelpers.run_nuget_discover_tool(repo_root: T.must(repo_contents_path),
                                                 workspace_path: workspace_path,
                                                 output_path: DiscoveryJsonReader.discovery_file_path,
                                                 credentials: credentials)
diff --git a/nuget/lib/dependabot/nuget/native_helpers.rb b/nuget/lib/dependabot/nuget/native_helpers.rb
index 65515c6d28c..4047feb226d 100644
--- a/nuget/lib/dependabot/nuget/native_helpers.rb
+++ b/nuget/lib/dependabot/nuget/native_helpers.rb
@@ -91,7 +91,7 @@ def self.get_nuget_discover_tool_command(repo_root:, workspace_path:, output_pat
 
       sig do
         params(
-          repo_root: T.nilable(String),
+          repo_root: String,
           workspace_path: String,
           output_path: String,
           credentials: T::Array[Dependabot::Credential]