diff --git a/app/screenshots/debug/dev.msfjarvis.lobsters.ui.posts.HeaderTest_headerDoesNotHaveATransparentBackground.png b/app/screenshots/debug/dev.msfjarvis.lobsters.ui.posts.HeaderTest_headerDoesNotHaveATransparentBackground.png
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index 00000000..24a81e5a
Binary files /dev/null and b/app/screenshots/debug/dev.msfjarvis.lobsters.ui.posts.HeaderTest_headerDoesNotHaveATransparentBackground.png differ
diff --git a/app/src/androidTest/java/dev/msfjarvis/lobsters/ui/posts/HeaderTest.kt b/app/src/androidTest/java/dev/msfjarvis/lobsters/ui/posts/HeaderTest.kt
new file mode 100644
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--- /dev/null
+++ b/app/src/androidTest/java/dev/msfjarvis/lobsters/ui/posts/HeaderTest.kt
@@ -0,0 +1,39 @@
+package dev.msfjarvis.lobsters.ui.posts
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.asAndroidBitmap
+import androidx.compose.ui.test.captureToImage
+import androidx.compose.ui.test.junit4.createComposeRule
+import androidx.compose.ui.test.onRoot
+import com.karumi.shot.ScreenshotTest
+import dev.msfjarvis.lobsters.ui.DarkTestTheme
+import java.time.Month
+import org.junit.Rule
+import org.junit.Test
+
+class HeaderTest : ScreenshotTest {
+  @get:Rule
+  val composeTestRule = createComposeRule()
+
+  @Test
+  fun headerDoesNotHaveATransparentBackground() {
+    composeTestRule.setContent {
+      DarkTestTheme {
+        Box(
+          modifier = Modifier
+            .background(color = Color(0xffffff))
+            .fillMaxWidth()
+            .fillMaxHeight(),
+        ) {
+          MonthHeader(month = Month.AUGUST)
+        }
+      }
+    }
+    compareScreenshot(composeTestRule.onRoot().captureToImage().asAndroidBitmap())
+  }
+}