diff --git a/kotlin-native/Interop/Indexer/src/test/kotlin/org/jetbrains/kotlin/native/interop/indexer/ModuleTests.kt b/kotlin-native/Interop/Indexer/src/test/kotlin/org/jetbrains/kotlin/native/interop/indexer/ModuleTests.kt
new file mode 100644
index 00000000000..8d0370de5bf
--- /dev/null
+++ b/kotlin-native/Interop/Indexer/src/test/kotlin/org/jetbrains/kotlin/native/interop/indexer/ModuleTests.kt
@@ -0,0 +1,166 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.native.interop.indexer
+
+import java.io.File
+import kotlin.test.Test
+import kotlin.test.assertContains
+import kotlin.test.assertEquals
+import kotlin.test.assertFails
+
+// Note: this class contains only very basic tests.
+class ModuleTests : IndexerTests() {
+
+    @Test
+    fun testSingleHeaderModule() {
+        val files = TempFiles("testSingleHeaderModule")
+
+        val header = files.file("Foo.h", "")
+
+        files.file("module.modulemap", """
+            module Foo {
+              header "Foo.h"
+            }
+        """.trimIndent())
+
+        val modulesInfo = getModulesInfo(compilationIncluding(files.directory), listOf("Foo"))
+        assertEquals(setOf(header.absolutePath), modulesInfo.ownHeaders)
+        assertEquals(listOf(header.absolutePath), modulesInfo.topLevelHeaders.canonicalize())
+    }
+
+    @Test
+    fun testModuleWithTransitiveInclude() {
+        val files = TempFiles("testModuleWithTransitiveInclude")
+
+        val fooH = files.file("Foo.h", """
+            #include "Bar.h"
+        """.trimIndent())
+
+        val barH = files.file("Bar.h", "")
+
+        files.file("module.modulemap", """
+            module Foo {
+              header "Foo.h"
+            }
+        """.trimIndent())
+
+        val modulesInfo = getModulesInfo(compilationIncluding(files.directory), listOf("Foo"))
+        assertEquals(setOf(fooH.absolutePath, barH.absolutePath), modulesInfo.ownHeaders)
+        assertEquals(listOf(fooH.absolutePath), modulesInfo.topLevelHeaders.canonicalize())
+    }
+
+    @Test
+    fun testModuleImportingOtherModule() {
+        val files = TempFiles("testModuleImportingOtherModule")
+
+        val fooH = files.file("Foo.h", """
+            #include "Bar.h"
+        """.trimIndent())
+
+        files.file("Bar.h", "")
+
+        files.file("module.modulemap", """
+            module Foo {
+              header "Foo.h"
+            }
+            module Bar {
+              header "Bar.h"
+            }
+        """.trimIndent())
+
+        val modulesInfo = getModulesInfo(compilationIncluding(files.directory), listOf("Foo"))
+        assertEquals(setOf(fooH.absolutePath), modulesInfo.ownHeaders)
+        assertEquals(listOf(fooH.absolutePath), modulesInfo.topLevelHeaders.canonicalize())
+    }
+
+    @Test
+    fun testFrameworkModule() {
+        val files = TempFiles("testFramework")
+        val fooH = files.file("Foo.framework/Headers/Foo.h", """
+            #include "Bar.h"
+            #include <Foo/Baz.h>
+        """.trimIndent())
+
+        val barH = files.file("Foo.framework/Headers/Bar.h", "")
+        val bazH = files.file("Foo.framework/Headers/Baz.h", "")
+
+        files.file("Foo.framework/Modules/module.modulemap", """
+            framework module Foo {
+              umbrella header "Foo.h"
+            }
+        """.trimIndent())
+
+        val modulesInfo = getModulesInfo(compilation("-F${files.directory}"), listOf("Foo"))
+        assertEquals(setOf(fooH.absolutePath, barH.absolutePath, bazH.absolutePath), modulesInfo.ownHeaders)
+        assertEquals(listOf(fooH.absolutePath), modulesInfo.topLevelHeaders.canonicalize())
+    }
+
+    @Test
+    fun testMissingModule() {
+        val files = TempFiles("testMissingModule")
+
+        val compilation = compilationIncluding(files.directory)
+
+        val error = assertFails {
+            getModulesInfo(compilation, modules = listOf("Foo"))
+        }
+
+        assertContains(error.message.orEmpty(), "fatal error: module 'Foo' not found")
+    }
+
+    @Test
+    fun testModuleWithMissingHeader() {
+        val files = TempFiles("testModuleWithMissingHeader")
+
+        files.file("module.modulemap", """
+            module Foo {
+              header "Foo.h"
+            }
+        """.trimIndent())
+
+        val compilation = compilationIncluding(files.directory)
+
+        val error = assertFails {
+            getModulesInfo(compilation, modules = listOf("Foo"))
+        }
+
+        assertContains(error.message.orEmpty(), "fatal error: could not build module 'Foo'")
+    }
+
+    @Test
+    fun testModuleWithBadCode() {
+        val files = TempFiles("testModuleWithBadCode")
+
+        files.file("Foo.h", """
+            bad code;
+        """.trimIndent())
+
+        files.file("module.modulemap", """
+            module Foo {
+              header "Foo.h"
+            }
+        """.trimIndent())
+
+        val compilation = compilationIncluding(files.directory)
+
+        val error = assertFails {
+            getModulesInfo(compilation, modules = listOf("Foo"))
+        }
+
+        assertContains(error.message.orEmpty(), "fatal error: could not build module 'Foo'")
+    }
+
+    private fun List<String>.canonicalize(): List<String> = this.map { File(it).canonicalPath }
+
+    private fun compilationIncluding(includeDirectory: File) = compilation("-I$includeDirectory")
+
+    private fun compilation(vararg args: String) = CompilationImpl(
+            includes = emptyList(),
+            additionalPreambleLines = emptyList(),
+            compilerArgs = listOf(*args),
+            language = Language.OBJECTIVE_C
+    )
+}