diff --git a/experimental/ActionPolyRing/src/Types.jl b/experimental/ActionPolyRing/src/Types.jl
index e95810300579..0cfb84c9c659 100644
--- a/experimental/ActionPolyRing/src/Types.jl
+++ b/experimental/ActionPolyRing/src/Types.jl
@@ -106,12 +106,6 @@ mutable struct DifferencePolyRingElem{T} <: ActionPolyRingElem{T}
     new{T}(upre, dpr, false, zeros(Int, length(upre)))
   end
 
-  function DifferencePolyRingElem{T}(dpr::DifferencePolyRing{T}, mpre::MPolyRingElem{T}) where {T}
-    upr = dpr.upoly_ring
-    @req upr.mpoly_ring === parent(mpre) "The parent does not match"
-    new{T}(upr(collect(coefficients(mpre)), collect(exponents(mpre))), dpr, false, zeros(Int, length(mpre)))
-  end
-
 end
 
 ### Differential ###
@@ -159,12 +153,6 @@ mutable struct DifferentialPolyRingElem{T} <: ActionPolyRingElem{T}
     new{T}(upre, dpr, false, zeros(Int, length(upre)))
   end
 
-  function DifferentialPolyRingElem{T}(dpr::DifferentialPolyRing{T}, mpre::MPolyRingElem{T}) where {T}
-    upr = dpr.upoly_ring
-    @req upr.mpoly_ring === parent(mpre) "The parent does not match"
-    new{T}(upr(collect(coefficients(mpre)), collect(exponents(mpre))), dpr, false, zeros(Int, length(mpre)))
-  end
-
 end
 
 ###############################################################################
diff --git a/experimental/ActionPolyRing/test/ActionPolyRing.jl b/experimental/ActionPolyRing/test/ActionPolyRing.jl
index 4910402d3f86..fa177585fcc2 100644
--- a/experimental/ActionPolyRing/test/ActionPolyRing.jl
+++ b/experimental/ActionPolyRing/test/ActionPolyRing.jl
@@ -646,14 +646,10 @@ using Test
             g = (u1_010 - 2) * (u1 - u1_100 + 3)
             @test dpr(data(f)) == f
             @test dpr(data(f)) !== f
-            @test dpr(data(data(f))) == f
-            @test dpr(data(data(f))) !== f
             @test dpr(f) === f
 
             @test dpr(data(g)) == g
             @test dpr(data(g)) !== g
-            @test dpr(data(data(g))) == g
-            @test dpr(data(data(g))) !== g
             @test dpr(g) === g
 
             @test f == 2*u2_100*u1_100 - u3_111*u1_100 - 2*u2_100*u1 + u3_111*u1 - 6*u2_100 + 3*u3_111