diff --git a/java/java-tests/testSrc/com/intellij/java/codeInsight/completion/commands/JavaCommandsCompletionTest.kt b/java/java-tests/testSrc/com/intellij/java/codeInsight/completion/commands/JavaCommandsCompletionTest.kt
index 12c791912738..0c6d2ff5e4fe 100644
--- a/java/java-tests/testSrc/com/intellij/java/codeInsight/completion/commands/JavaCommandsCompletionTest.kt
+++ b/java/java-tests/testSrc/com/intellij/java/codeInsight/completion/commands/JavaCommandsCompletionTest.kt
@@ -215,7 +215,10 @@ class JavaCommandsCompletionTest : LightFixtureCompletionTestCase() {
       }
       """.trimIndent())
     val elements = myFixture.completeBasic()
-    selectItem(elements.first { element -> element.lookupString.contains("copy ref", ignoreCase = true) })
+    val item = elements.first { element -> element.lookupString.contains("copy ref", ignoreCase = true) }
+    val preview = (item.`as`(CommandCompletionLookupElement::class.java))?.preview
+    assertEquals("Copy reference for 'foo'.", (preview as IntentionPreviewInfo.Html).content().toString())
+    selectItem(item)
     myFixture.performEditorAction(IdeActions.ACTION_EDITOR_PASTE)
     NonBlockingReadActionImpl.waitForAsyncTaskCompletion()
     myFixture.checkResult("""
diff --git a/platform/lang-impl/src/com/intellij/codeInsight/completion/command/commands/AbstractActionCompletionCommand.kt b/platform/lang-impl/src/com/intellij/codeInsight/completion/command/commands/AbstractActionCompletionCommand.kt
index bde432cc9f5b..870d95df4eea 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/completion/command/commands/AbstractActionCompletionCommand.kt
+++ b/platform/lang-impl/src/com/intellij/codeInsight/completion/command/commands/AbstractActionCompletionCommand.kt
@@ -238,8 +238,12 @@ open class ActionCompletionCommand(
   }
 
   override fun getPreview(): IntentionPreviewInfo {
-    if (previewText == null) return IntentionPreviewInfo.EMPTY
-    return IntentionPreviewInfo.Html(previewText)
+    var contentHtml = previewText
+    if (contentHtml == null) return IntentionPreviewInfo.EMPTY
+    if (!contentHtml.endsWith(".")) {
+      contentHtml = "$contentHtml."
+    }
+    return IntentionPreviewInfo.Html(contentHtml)
   }
 }