diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index b22ca53c59..191ac71b8d 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -150,7 +150,7 @@ test_konsist = "com.lemonappdev:konsist:0.17.3"
 test_turbine = "app.cash.turbine:turbine:1.2.1"
 test_truth = "com.google.truth:truth:1.4.4"
 test_parameter_injector = "com.google.testparameterinjector:test-parameter-injector:1.18"
-test_robolectric = "org.robolectric:robolectric:4.14.1"
+test_robolectric = "org.robolectric:robolectric:4.15"
 test_appyx_junit = { module = "com.bumble.appyx:testing-junit4", version.ref = "appyx" }
 test_composable_preview_scanner = "io.github.sergio-sastre.ComposablePreviewScanner:android:0.6.1"
 test_detekt_api = { module = "io.gitlab.arturbosch.detekt:detekt-api", version.ref = "detekt" }
diff --git a/libraries/mediaviewer/impl/src/test/kotlin/io/element/android/libraries/mediaviewer/impl/util/FileExtensionExtractorWithValidationTest.kt b/libraries/mediaviewer/impl/src/test/kotlin/io/element/android/libraries/mediaviewer/impl/util/FileExtensionExtractorWithValidationTest.kt
index e5e811fb33..e2399eae34 100644
--- a/libraries/mediaviewer/impl/src/test/kotlin/io/element/android/libraries/mediaviewer/impl/util/FileExtensionExtractorWithValidationTest.kt
+++ b/libraries/mediaviewer/impl/src/test/kotlin/io/element/android/libraries/mediaviewer/impl/util/FileExtensionExtractorWithValidationTest.kt
@@ -17,9 +17,7 @@ class FileExtensionExtractorWithValidationTest {
     @Test
     fun `test FileExtensionExtractor with validation OK`() {
         val sut = FileExtensionExtractorWithValidation()
-        // The result should be txt, but with Robolectric,
-        // MimeTypeMap.getSingleton().hasExtension() always returns false
-        assertThat(sut.extractFromName("test.txt")).isEqualTo("bin")
+        assertThat(sut.extractFromName("test.txt")).isEqualTo("txt")
     }
 
     @Test