diff --git a/tests/main.cr b/tests/main.cr
index 7c5efba2..e5fb2f86 100644
--- a/tests/main.cr
+++ b/tests/main.cr
@@ -5,7 +5,7 @@ require "./spec_helper"
 hint = ""
 
 describe "./modules/default.nix" do
-  it "imports all modules" do
+  it "imports all modules in directory" do
     all_modules = Dir.children("modules")
     all_modules.delete("default.nix")
     modules = File.read("./modules/default.nix")
@@ -17,6 +17,21 @@ describe "./modules/default.nix" do
 
     hint = ""
   end
+
+  it "only imports modules that exist" do
+    all_modules = Dir.children("modules")
+    all_modules.delete("default.nix")
+
+    File.each_line("./modules/default.nix") do |line|
+      if line.includes? "./"
+        imported_file = line.lstrip(' ').lstrip("./")
+        hint = "./#{imported_file} was imported but doesn't exist in directory ./modules/."
+        all_modules.includes?(imported_file).should be_true
+      end
+    end
+
+    hint = ""
+  end
 end
 
 describe "./overlays/joshuto/default.nix" do