diff --git a/plugins/git4idea/tests/git4idea/push/GitPushOperationSingleRepoTest.kt b/plugins/git4idea/tests/git4idea/push/GitPushOperationSingleRepoTest.kt
index 8d2b5506759d..89b9f8cf3bc7 100644
--- a/plugins/git4idea/tests/git4idea/push/GitPushOperationSingleRepoTest.kt
+++ b/plugins/git4idea/tests/git4idea/push/GitPushOperationSingleRepoTest.kt
@@ -253,7 +253,7 @@ class GitPushOperationSingleRepoTest : GitPushOperationBaseTest() {
     val log = git("log -3 --pretty=%H#%s")
     val commits = StringUtil.splitByLines(log)
     val lastCommitMsg = commits[0].split("#".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()[1]
-    assertTrue("The last commit doesn't look like a merge commit: " + lastCommitMsg, lastCommitMsg.contains("Merge"))
+    assertTrue("The last commit doesn't look like a merge commit: $lastCommitMsg", lastCommitMsg.contains("Merge"))
     assertEquals(hash, commits[1].split("#".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()[0])
     assertEquals(broHash, commits[2].split("#".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray()[0])
 
@@ -392,13 +392,13 @@ class GitPushOperationSingleRepoTest : GitPushOperationBaseTest() {
     })
 
     push("master", "origin/master")
-    assertTrue("Default action in rejected-push dialog is incorrect: " + defaultActionName,
-        defaultActionName.toLowerCase().contains("rebase"))
+    assertTrue("Default action in rejected-push dialog is incorrect: $defaultActionName",
+               defaultActionName.toLowerCase().contains("rebase"))
 
     git("config branch.master.rebase false")
     push("master", "origin/master")
-    assertTrue("Default action in rejected-push dialog is incorrect: " + defaultActionName,
-        defaultActionName.toLowerCase().contains("merge"))
+    assertTrue("Default action in rejected-push dialog is incorrect: $defaultActionName",
+               defaultActionName.toLowerCase().contains("merge"))
   }
 
   fun `test respect branch default setting for silent update when rejected push`() {
@@ -487,7 +487,7 @@ class GitPushOperationSingleRepoTest : GitPushOperationBaseTest() {
 
   private fun assertPushed(expectedHash: String, branch: String) {
     Executor.cd(parentRepo.path)
-    val actualHash = git("log -1 --pretty=%H " + branch)
+    val actualHash = git("log -1 --pretty=%H $branch")
     assertEquals(expectedHash, actualHash)
   }