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diff --git a/users/wpcarro/assessments/semiprimes/server/test/server_test.exs b/users/wpcarro/assessments/semiprimes/server/test/server_test.exs
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+defmodule ServerTest do
+  use ExUnit.Case
+  doctest Server
+
+  describe "semiprime" do
+    test "returns the factors when the number is semiprime" do
+      Cache.clear()
+      # Semiprimes below 30
+      [
+        {4, [2, 2]},
+        {6, [2, 3]},
+        {9, [3, 3]},
+        {10, [2, 5]},
+        {14, [2, 7]},
+        {15, [3, 5]},
+        {21, [3, 7]},
+        {22, [2, 11]},
+        {25, [5, 5]},
+        {26, [2, 13]}
+      ]
+      |> Enum.each(fn {input, expected} ->
+        assert Server.semiprime(input) == {:miss, expected}
+      end)
+    end
+
+    test "returns nothing when the number is a composite number" do
+      # Composite numbers below 30
+      [1, 2, 3, 5, 7, 8, 11, 12, 13, 16, 17, 18, 19, 20, 23, 24, 27, 28, 29]
+      |> Enum.each(fn x ->
+        assert Server.semiprime(x) == nil
+      end)
+    end
+  end
+end