diff --git a/src/ambiguities.jl b/src/ambiguities.jl
index 4491a49b..c5b7330e 100644
--- a/src/ambiguities.jl
+++ b/src/ambiguities.jl
@@ -25,31 +25,29 @@ false-positive.
 - Other keyword arguments such as `imported` and `ambiguous_bottom`
   are passed to `Test.detect_ambiguities` as-is.
 """
-test_ambiguities(packages; kwargs...) = _test_ambiguities(aspkgids(packages); kwargs...)
+test_ambiguities(packages; kwargs...) = test_ambiguities(aspkgids(packages); kwargs...)
 
-const ExcludeSpec = Pair{Base.PkgId,String}
+function test_ambiguities(packages::Vector{PkgId}; broken::Bool = false, kwargs...)
+    num_ambiguities, strout, strerr = Ambiguities.find_ambiguities(packages; kwargs...)
 
-aspkgids(pkg::Union{Module,PkgId}) = aspkgids([pkg])
-aspkgids(packages) = mapfoldl(aspkgid, push!, packages, init = PkgId[])
+    println(stderr, strerr)
+    println(stdout, strout)
 
-aspkgid(pkg::PkgId) = pkg
-function aspkgid(m::Module)
-    if !ispackage(m)
-        error("Non-package (non-toplevel) module is not supported. Got: $m")
+    if broken
+        @test_broken num_ambiguities == 0
+    else
+        @test num_ambiguities == 0
     end
-    return PkgId(m)
-end
-function aspkgid(name::Symbol)
-    # Maybe `Base.depwarn()`
-    return Base.identify_package(String(name))::PkgId
 end
 
-ispackage(m::Module) =
-    if m in (Base, Core)
-        true
-    else
-        parentmodule(m) == m
-    end
+module Ambiguities
+
+using Base: PkgId
+using Test: detect_ambiguities
+
+using ..Aqua: checked_repr, reprpkgid
+
+const ExcludeSpec = Pair{Base.PkgId,String}
 
 strnameof(x) = string(x)
 strnameof(x::Type) = string(nameof(x))
@@ -81,23 +79,10 @@ function reprexclude(exspecs::Vector{ExcludeSpec})
     itemreprs = map(exspecs) do (pkgid, name)
         string("(", reprpkgid(pkgid), " => ", repr(name), ")")
     end
-    return string("Aqua.ExcludeSpec[", join(itemreprs, ", "), "]")
+    return string("Aqua.Ambiguities.ExcludeSpec[", join(itemreprs, ", "), "]")
 end
 
-function _test_ambiguities(packages::Vector{PkgId}; broken::Bool = false, kwargs...)
-    num_ambiguities, strout, strerr = _find_ambiguities(packages; kwargs...)
-
-    println(stderr, strerr)
-    println(stdout, strout)
-
-    if broken
-        @test_broken num_ambiguities == 0
-    else
-        @test num_ambiguities == 0
-    end
-end
-
-function _find_ambiguities(
+function find_ambiguities(
     packages::Vector{PkgId};
     color::Union{Bool,Nothing} = nothing,
     exclude::AbstractVector = [],
@@ -113,7 +98,7 @@ function _find_ambiguities(
     code = """
     $(Base.load_path_setup_code())
     using Aqua
-    Aqua.test_ambiguities_impl(
+    Aqua.Ambiguities.test_ambiguities_impl(
         $packages_repr,
         $options_repr,
         $exclude_repr,
@@ -153,15 +138,6 @@ function reprpkgids(packages::Vector{PkgId})
     return packages_repr
 end
 
-function reprpkgid(pkg::PkgId)
-    name = pkg.name
-    if pkg.uuid === nothing
-        return "Base.PkgId($(repr(name)))"
-    end
-    uuid = pkg.uuid.value
-    return "Base.PkgId(Base.UUID($(repr(uuid))), $(repr(name)))"
-end
-
 struct _NoValue end
 
 function getobj(m::Method)
@@ -252,3 +228,5 @@ function ambiguity_hint(m1::Method, m2::Method)
         end
     end
 end
+
+end # module
diff --git a/src/utils.jl b/src/utils.jl
index 0179714e..33ab30ca 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -12,6 +12,33 @@ function askwargs(flag::Bool)
     return NamedTuple()
 end
 
+aspkgids(pkg::Union{Module,PkgId}) = aspkgids([pkg])
+aspkgids(packages) = map(aspkgid, packages)
+
+aspkgid(pkg::PkgId) = pkg
+function aspkgid(m::Module)
+    if !ispackage(m)
+        error("Non-package (non-toplevel) module is not supported. Got: $m")
+    end
+    return PkgId(m)
+end
+
+ispackage(m::Module) =
+    if m in (Base, Core)
+        true
+    else
+        parentmodule(m) == m
+    end
+
+function reprpkgid(pkg::PkgId)
+    name = pkg.name
+    if pkg.uuid === nothing
+        return "Base.PkgId($(repr(name)))"
+    end
+    uuid = pkg.uuid.value
+    return "Base.PkgId(Base.UUID($(repr(uuid))), $(repr(name)))"
+end
+
 struct LazyTestResult
     label::String
     message::String
diff --git a/test/test_ambiguities.jl b/test/test_ambiguities.jl
index ad2d8557..33a7051c 100644
--- a/test/test_ambiguities.jl
+++ b/test/test_ambiguities.jl
@@ -2,12 +2,15 @@ module TestAmbiguities
 
 include("preamble.jl")
 
+using Aqua: Ambiguities
+
 using PkgWithAmbiguities
 
 @testset begin
     function check_testcase(exclude, num_ambiguities::Int; broken::Bool = false)
         pkgids = Aqua.aspkgids([PkgWithAmbiguities, Core]) # include Core to find constructor ambiguities
-        num_ambiguities_, strout, strerr = Aqua._find_ambiguities(pkgids; exclude = exclude)
+        num_ambiguities_, strout, strerr =
+            Ambiguities.find_ambiguities(pkgids; exclude = exclude)
         if broken
             @test_broken num_ambiguities_ == num_ambiguities
         else
diff --git a/test/test_exclude.jl b/test/test_exclude.jl
index 6eca9659..4f15c2a7 100644
--- a/test/test_exclude.jl
+++ b/test/test_exclude.jl
@@ -1,8 +1,11 @@
 module TestExclude
 
 include("preamble.jl")
+
 using Base: PkgId
-using Aqua: getobj, normalize_exclude, normalize_and_check_exclude, rootmodule, reprexclude
+
+using Aqua.Ambiguities:
+    getobj, normalize_exclude, normalize_and_check_exclude, rootmodule, reprexclude
 
 @assert parentmodule(Tuple) === Core
 @assert parentmodule(foldl) === Base
diff --git a/test/test_getobj.jl b/test/test_getobj.jl
index 48acc11c..01096c18 100644
--- a/test/test_getobj.jl
+++ b/test/test_getobj.jl
@@ -1,6 +1,6 @@
 module TestGetObj
 
-using Aqua: getobj
+using Aqua.Ambiguities: getobj
 using Test
 
 module ModuleA