diff --git a/build.sbt b/build.sbt
index 526f297dfa..343fde9441 100644
--- a/build.sbt
+++ b/build.sbt
@@ -492,6 +492,31 @@ def mimaSettings(moduleName: String, includeCats1: Boolean = true) =
         ) ++ // Additional methods in package-private traits
         Seq(
           exclude[ReversedMissingMethodProblem]("cats.data.NonEmptyCollection.grouped")
+        ) ++ // https://github.com/typelevel/cats/pull/3785
+        Seq(
+          exclude[MissingClassProblem]("cats.syntax.EqOps$mcJ$sp"),
+          exclude[MissingClassProblem]("cats.syntax.EqOps$mcD$sp"),
+          exclude[FinalClassProblem]("cats.syntax.EqOps"),
+          exclude[MissingFieldProblem]("cats.syntax.EqOps.lhs"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.unapply"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.apply"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.lhs"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.copy"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.copy$default$1"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.productPrefix"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.productArity"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.productElement"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.productIterator"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.canEqual"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.copy$default$1$mcD$sp"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.copy$default$1$mcF$sp"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.copy$default$1$mcJ$sp"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.copy$default$1$mcI$sp"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.productElementNames"),
+          exclude[DirectMissingMethodProblem]("cats.syntax.EqOps.productElementName"),
+          exclude[MissingClassProblem]("cats.syntax.EqOps$"),
+          exclude[MissingClassProblem]("cats.syntax.EqOps$mcF$sp"),
+          exclude[MissingClassProblem]("cats.syntax.EqOps$mcI$sp")
         )
     }
   )
diff --git a/core/src/main/scala-2.x/src/main/scala/cats/syntax/eq.scala b/core/src/main/scala-2.x/src/main/scala/cats/syntax/eq.scala
deleted file mode 100644
index 286a6f0990..0000000000
--- a/core/src/main/scala-2.x/src/main/scala/cats/syntax/eq.scala
+++ /dev/null
@@ -1,20 +0,0 @@
-package cats
-package syntax
-
-import scala.{specialized => sp}
-
-trait EqSyntax {
-
-  /**
-   * not final so it can be disabled in favor of scalactic equality in tests
-   */
-  implicit def catsSyntaxEq[@sp(Int, Long, Float, Double) A: Eq](a: A): EqOps[A] =
-    new EqOps[A](a)
-}
-
-final case class EqOps[@sp(Int, Long, Float, Double) A: Eq](lhs: A) {
-  def ===(rhs: A): Boolean = Eq[A].eqv(lhs, rhs)
-  def =!=(rhs: A): Boolean = Eq[A].neqv(lhs, rhs)
-  def eqv(rhs: A): Boolean = Eq[A].eqv(lhs, rhs)
-  def neqv(rhs: A): Boolean = Eq[A].neqv(lhs, rhs)
-}
diff --git a/core/src/main/scala-3.x/src/main/scala/cats/syntax/eq.scala b/core/src/main/scala/cats/syntax/eq.scala
similarity index 100%
rename from core/src/main/scala-3.x/src/main/scala/cats/syntax/eq.scala
rename to core/src/main/scala/cats/syntax/eq.scala