diff --git a/spec/unit/puppet/parser/functions/getvar_spec.rb b/spec/unit/puppet/parser/functions/getvar_spec.rb
index 271f15e..b150a0e 100644
--- a/spec/unit/puppet/parser/functions/getvar_spec.rb
+++ b/spec/unit/puppet/parser/functions/getvar_spec.rb
@@ -23,11 +23,13 @@ describe Puppet::Parser::Functions.function(:getvar) do
   describe 'when calling getvar from puppet' do
 
     it "should not compile when no arguments are passed" do
+      pending("Fails on 2.6.x, see bug #15912") if Puppet.version =~ /^2\.6\./
       Puppet[:code] = '$rval = getvar()'
       get_scope
       expect { @scope.compiler.compile }.should raise_error(Puppet::ParseError, /wrong number of arguments/)
     end
     it "should not compile when too many arguments are passed" do
+      pending("Fails on 2.6.x, see bug #15912") if Puppet.version =~ /^2\.6\./
       Puppet[:code] = '$rval = getvar("foo::bar", "baz")'
       get_scope
       expect { @scope.compiler.compile }.should raise_error(Puppet::ParseError, /wrong number of arguments/)
diff --git a/spec/unit/puppet/parser/functions/has_key_spec.rb b/spec/unit/puppet/parser/functions/has_key_spec.rb
index bf91509..bb2cc76 100644
--- a/spec/unit/puppet/parser/functions/has_key_spec.rb
+++ b/spec/unit/puppet/parser/functions/has_key_spec.rb
@@ -22,14 +22,17 @@ describe Puppet::Parser::Functions.function(:has_key) do
 
   describe 'when calling has_key from puppet' do
     it "should not compile when no arguments are passed" do
+      pending("Fails on 2.6.x, see bug #15912") if Puppet.version =~ /^2\.6\./
       Puppet[:code] = '$rval = has_key()'
       expect { compiler.compile }.should raise_error(Puppet::ParseError, /wrong number of arguments/)
     end
     it "should not compile when 1 argument is passed" do
+      pending("Fails on 2.6.x, see bug #15912") if Puppet.version =~ /^2\.6\./
       Puppet[:code] = "$rval = has_key('foo')"
       expect { compiler.compile }.should raise_error(Puppet::ParseError, /wrong number of arguments/)
     end
     it "should require the first value to be a Hash" do
+      pending("Fails on 2.6.x, see bug #15912") if Puppet.version =~ /^2\.6\./
       Puppet[:code] = "$rval = has_key('foo', 'bar')"
       expect { compiler.compile }.should raise_error(Puppet::ParseError, /expects the first argument to be a hash/)
     end
diff --git a/spec/unit/puppet/parser/functions/merge_spec.rb b/spec/unit/puppet/parser/functions/merge_spec.rb
index a91dca7..188c914 100644
--- a/spec/unit/puppet/parser/functions/merge_spec.rb
+++ b/spec/unit/puppet/parser/functions/merge_spec.rb
@@ -22,33 +22,38 @@ describe Puppet::Parser::Functions.function(:merge) do
 
   describe 'when calling merge from puppet' do
     it "should not compile when no arguments are passed" do
+      pending("Fails on 2.6.x, see bug #15912") if Puppet.version =~ /^2\.6\./
       Puppet[:code] = '$rval = merge()'
       expect { compiler.compile }.should raise_error(Puppet::ParseError, /wrong number of arguments/)
     end
+
     it "should not compile when 1 argument is passed" do
+      pending("Fails on 2.6.x, see bug #15912") if Puppet.version =~ /^2\.6\./
       Puppet[:code] = "$my_hash={'one' => 1}\n$rval = merge($my_hash)"
       expect { compiler.compile }.should raise_error(Puppet::ParseError, /wrong number of arguments/)
     end
   end
+
   describe 'when calling merge on the scope instance' do
     it 'should require all parameters are hashes' do
       expect { new_hash = scope.function_merge([{}, '2'])}.should raise_error(Puppet::ParseError, /unexpected argument type String/)
 
     end
+
     it 'should be able to merge two hashes' do
       new_hash = scope.function_merge([{'one' => '1', 'two' => '1'}, {'two' => '2', 'three' => '2'}])
       new_hash['one'].should   == '1'
       new_hash['two'].should   == '2'
       new_hash['three'].should == '2'
     end
+
     it 'should merge multiple hashes' do
       hash = scope.function_merge([{'one' => 1}, {'one' => '2'}, {'one' => '3'}])
       hash['one'].should == '3'
     end
+
     it 'should accept empty hashes' do
       scope.function_merge([{},{},{}]).should == {}
     end
-
   end
-
 end