diff --git a/scalafmt-core/shared/src/main/scala/org/scalafmt/internal/Router.scala b/scalafmt-core/shared/src/main/scala/org/scalafmt/internal/Router.scala
index efa4e5e7ef..1eeb9f1b02 100644
--- a/scalafmt-core/shared/src/main/scala/org/scalafmt/internal/Router.scala
+++ b/scalafmt-core/shared/src/main/scala/org/scalafmt/internal/Router.scala
@@ -1175,6 +1175,7 @@ class Router(formatOps: FormatOps) {
         val indent = Indent(Num(indentLen), close, Before)
         val noSplitIndents =
           if (style.binPack.indentCallSiteOnce) Seq.empty
+          else if (isSingleArg && oneline && !needOnelinePolicy) Seq.empty
           else if (
             if (isTuple(leftOwner)) style.align.getOpenParenTupleSite
             else style.align.getOpenDelimSite(false, false)
@@ -1217,7 +1218,7 @@ class Router(formatOps: FormatOps) {
             baseNoSplit
               .withOptimalTokenOpt(opt)
               .withPolicy(penalizeNewlinesPolicy)
-              .andPolicy(unindentPolicy, !isSingleArg)
+              .andPolicy(unindentPolicy, !isSingleArg || noSplitIndents.isEmpty)
               .andPolicyOpt(nextCommaOnelinePolicy)
           }
 
diff --git a/scalafmt-tests/src/test/resources/default/Apply.stat b/scalafmt-tests/src/test/resources/default/Apply.stat
index 0d3a905b6e..6ea4cd0ae1 100644
--- a/scalafmt-tests/src/test/resources/default/Apply.stat
+++ b/scalafmt-tests/src/test/resources/default/Apply.stat
@@ -1773,8 +1773,8 @@ object a {
     symForName
       .getAnnotation(JSNameAnnotation).fold {
         sym.addAnnotation(JSNameAnnotation,
-                          Literal(Constant(jsInterop.defaultJSNameOf(
-                                             symForName))))
+                          Literal(Constant(
+                            jsInterop.defaultJSNameOf(symForName))))
       } { annot =>
         sym.addAnnotation(annot)
       }
diff --git a/scalafmt-tests/src/test/resources/newlines/source_classic.stat b/scalafmt-tests/src/test/resources/newlines/source_classic.stat
index 2568a51424..6ce3a1c4db 100644
--- a/scalafmt-tests/src/test/resources/newlines/source_classic.stat
+++ b/scalafmt-tests/src/test/resources/newlines/source_classic.stat
@@ -4501,12 +4501,12 @@ object a {
 >>>
 object a {
   binder.bind("f", params) shouldBe Some(Left(
-      s"Cannot parse parameter f as DummyEnum, $wrongValue is not a member of Enum (dummy-value)"
-    ))
+    s"Cannot parse parameter f as DummyEnum, $wrongValue is not a member of Enum (dummy-value)"
+  ))
 
   when(audienceService.publish(any[Tenant], any[Int])).thenReturn(
     Success[NonEmptyList[String], ApiAudience](apiAudience
-        .copy(status = AudienceStatus.Pending.name))
+      .copy(status = AudienceStatus.Pending.name))
   )
 }
 <<< unsafeCallSite = Oneline, nested with one arg, several options
diff --git a/scalafmt-tests/src/test/resources/newlines/source_fold.stat b/scalafmt-tests/src/test/resources/newlines/source_fold.stat
index a49e733ffc..bccf3c61d7 100644
--- a/scalafmt-tests/src/test/resources/newlines/source_fold.stat
+++ b/scalafmt-tests/src/test/resources/newlines/source_fold.stat
@@ -4312,12 +4312,12 @@ object a {
 >>>
 object a {
   binder.bind("f", params) shouldBe Some(Left(
-      s"Cannot parse parameter f as DummyEnum, $wrongValue is not a member of Enum (dummy-value)"
-    ))
+    s"Cannot parse parameter f as DummyEnum, $wrongValue is not a member of Enum (dummy-value)"
+  ))
 
   when(audienceService.publish(any[Tenant], any[Int]))
     .thenReturn(Success[NonEmptyList[String], ApiAudience](apiAudience
-          .copy(status = AudienceStatus.Pending.name)))
+      .copy(status = AudienceStatus.Pending.name)))
 }
 <<< unsafeCallSite = Oneline, nested with one arg, several options
 maxColumn = 100
diff --git a/scalafmt-tests/src/test/resources/newlines/source_keep.stat b/scalafmt-tests/src/test/resources/newlines/source_keep.stat
index 995d36dddd..1c4ccca13e 100644
--- a/scalafmt-tests/src/test/resources/newlines/source_keep.stat
+++ b/scalafmt-tests/src/test/resources/newlines/source_keep.stat
@@ -4527,12 +4527,12 @@ object a {
 >>>
 object a {
   binder.bind("f", params) shouldBe Some(Left(
-      s"Cannot parse parameter f as DummyEnum, $wrongValue is not a member of Enum (dummy-value)"
-    ))
+    s"Cannot parse parameter f as DummyEnum, $wrongValue is not a member of Enum (dummy-value)"
+  ))
 
   when(audienceService.publish(any[Tenant], any[Int])).thenReturn(
     Success[NonEmptyList[String], ApiAudience](apiAudience
-        .copy(status = AudienceStatus.Pending.name))
+      .copy(status = AudienceStatus.Pending.name))
   )
 }
 <<< unsafeCallSite = Oneline, nested with one arg, several options
diff --git a/scalafmt-tests/src/test/resources/scalajs/Apply.stat b/scalafmt-tests/src/test/resources/scalajs/Apply.stat
index 636afe7284..215d124814 100644
--- a/scalafmt-tests/src/test/resources/scalajs/Apply.stat
+++ b/scalafmt-tests/src/test/resources/scalajs/Apply.stat
@@ -206,7 +206,7 @@ object a {
 >>>
 object a {
   new SimpleMethodName(new SimpleMethodName(
-          validateSimpleEncodedName(name, 0, len, openAngleBracketOK = false)))
+      validateSimpleEncodedName(name, 0, len, openAngleBracketOK = false)))
 }
 <<< #2079 avoid nested indent, always; 3
 binPack.preset = true
@@ -242,9 +242,9 @@ object a {
 >>>
 object a {
   foo(new SimpleMethodName(new SimpleMethodName(validateSimpleEncodedName(name,
-                  0, len, openAngleBracketOK = false))),
+          0, len, openAngleBracketOK = false))),
       new SimpleMethodName(new SimpleMethodName(validateSimpleEncodedName(name,
-                  0, len, openAngleBracketOK = false))))
+          0, len, openAngleBracketOK = false))))
 }
 <<< #2079 avoid nested indent, always; 4
 binPack.preset = true
@@ -273,8 +273,8 @@ object a {
 >>>
 object a {
   new SimpleMethodName(
-      new SimpleMethodName(new SimpleMethodName(validateSimpleEncodedName(name,
-                  0, len, openAngleBracketOK = false)))
+      new SimpleMethodName(new SimpleMethodName(
+          validateSimpleEncodedName(name, 0, len, openAngleBracketOK = false)))
   ).foo
 }
 <<< binpack=oneline, nested, inner with multiple args
@@ -292,7 +292,7 @@ object a {
 object a {
   if (staticInitializerStats.nonEmpty) {
     List(genStaticConstructorWithStats(ir.Names.StaticInitializerName,
-            js.Block(staticInitializerStats)))
+        js.Block(staticInitializerStats)))
   } else
     Nil
 }