diff --git a/base/src/test/kotlin/proguard/ConfigurationWriterTest.kt b/base/src/test/kotlin/proguard/ConfigurationWriterTest.kt
new file mode 100644
index 00000000..5bd67741
--- /dev/null
+++ b/base/src/test/kotlin/proguard/ConfigurationWriterTest.kt
@@ -0,0 +1,85 @@
+package proguard
+
+import io.kotest.core.spec.style.FreeSpec
+import io.kotest.matchers.shouldBe
+import io.kotest.matchers.string.shouldContain
+import java.io.PrintWriter
+import java.io.StringWriter
+
+/**
+ * Test printing of the configuration (-printconfiguration option).
+ */
+class ConfigurationWriterTest : FreeSpec({
+    fun printConfiguration(rules: String): String {
+        val out = StringWriter()
+        val configuration = Configuration()
+
+        ConfigurationParser(rules, "", null, System.getProperties()).use {
+            it.parse(configuration)
+        }
+
+        ConfigurationWriter(PrintWriter(out)).use {
+            it.write(configuration)
+        }
+
+        return out.toString().trim()
+    }
+
+    "Hash character handling tests" - {
+        "Comments should not be quoted" {
+            printConfiguration("# comment\n-keep class **") shouldBe "# comment\n-keep class **"
+        }
+
+        "Hash characters in comments should not be quoted" {
+            printConfiguration("# #comment\n-keep class **") shouldBe "# #comment\n-keep class **"
+        }
+    }
+
+    "Given a -dontnote rule specifying a class name" - {
+        val rules = "-dontnote com.example.MyClass"
+
+        "When the rule is parsed and printed out again" - {
+            val out = printConfiguration(rules)
+
+            "Then the printed rule should be the same as the given rule" {
+                out shouldBe rules
+            }
+        }
+    }
+
+    "Given a -dontnote rule specifying a class name with wildcards" - {
+        val rules = "-dontnote com.example.**"
+
+        "When the rule is parsed and printed out again" - {
+            val out = printConfiguration(rules)
+
+            "Then the printed rule should be the same as the given rule" {
+                out shouldBe rules
+            }
+        }
+    }
+
+    "Given a -addconfigurationdebugging rule" - {
+        val rules = "-addconfigurationdebugging"
+
+        "When the rules are parsed and printed out again" - {
+            val out = printConfiguration(rules)
+
+            "Then the rules should be present in the output" {
+                out shouldContain rules
+            }
+        }
+    }
+
+    "Given an -optimizeaggressively rule" - {
+        val rules = "-optimizeaggressively"
+
+        "When the rule is parsed and printed out again" - {
+            val out = printConfiguration(rules)
+
+            "Then the rule should be present in the output" {
+                out shouldBe rules
+            }
+        }
+    }
+})