diff --git a/wot-dijkstra/src/test/kotlin/org/pgpainless/wot/dijkstra/RegexSetTest.kt b/wot-dijkstra/src/test/kotlin/org/pgpainless/wot/dijkstra/RegexSetTest.kt
new file mode 100644
index 00000000..9e31cff4
--- /dev/null
+++ b/wot-dijkstra/src/test/kotlin/org/pgpainless/wot/dijkstra/RegexSetTest.kt
@@ -0,0 +1,38 @@
+package org.pgpainless.wot.dijkstra
+
+import org.junit.jupiter.api.Test
+import org.pgpainless.wot.dijkstra.sq.RegexSet
+import kotlin.test.assertFalse
+import kotlin.test.assertTrue
+
+class RegexSetTest {
+
+    private val exampleComRegex = "<[^>]+[@.]example\\.com>\$"
+    private val pgpainlessOrgRegex = "<[^>]+[@.]pgpainless\\.org>\$"
+
+    @Test
+    fun testWildcard() {
+        val wildcard = RegexSet.wildcard()
+        assertTrue { wildcard.matches("Alice <alice@pgpainless.org>") }
+        assertTrue { wildcard.matches("Bob <bob@example.com>") }
+    }
+
+    @Test
+    fun testDomainRegex() {
+        val exampleCom = RegexSet.fromExpression(exampleComRegex)
+        assertTrue { exampleCom.matches("Bob <bob@example.com>") }
+        assertTrue { exampleCom.matches("<admin@example.com>") }
+        assertFalse { exampleCom.matches("Spoofed <bob@examp1e.com>") }
+        assertFalse { exampleCom.matches("Alice <alice@pgpainless.org>") }
+    }
+
+    @Test
+    fun testMultipleDomainRegex() {
+        val multi = RegexSet.fromExpressionList(listOf(exampleComRegex, pgpainlessOrgRegex))
+        assertTrue { multi.matches("Bob <bob@example.com>") }
+        assertTrue { multi.matches("Alice <alice@pgpainless.org>") }
+        assertTrue { multi.matches("<info@pgpainless.org>") }
+        assertFalse { multi.matches("Alice") }
+        assertFalse { multi.matches("<info@examp1e.com>") }
+    }
+}
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