diff --git a/lang/Makefile b/lang/Makefile
index daed3a03..ea2a089b 100644
--- a/lang/Makefile
+++ b/lang/Makefile
@@ -23,8 +23,11 @@ OLDGOYACC := $(shell go version | grep -E 'go1.6|go1.7')
 all: build
 
 build: lexer.nn.go y.go
+	@# recursively run make in child dir named types
+	@$(MAKE) --quiet -C types
 
 clean:
+	$(MAKE) --quiet -C types clean
 	@rm -f lexer.nn.go y.go y.output || true
 
 lexer.nn.go: lexer.nex
diff --git a/lang/interpret_test/TestAstFunc1/fail2.graph b/lang/interpret_test/TestAstFunc1/fail2.graph
index 8cb726c2..749e37a0 100644
--- a/lang/interpret_test/TestAstFunc1/fail2.graph
+++ b/lang/interpret_test/TestAstFunc1/fail2.graph
@@ -1 +1 @@
-# err: err3: can't unify, invariant illogicality with equality: base kind does not match (2 != 3)
+# err: err3: can't unify, invariant illogicality with equality: base kind does not match (Str != Int)
diff --git a/lang/interpret_test/TestAstFunc1/polydoubleincludewithtype.graph b/lang/interpret_test/TestAstFunc1/polydoubleincludewithtype.graph
index 0a0315fb..6823f818 100644
--- a/lang/interpret_test/TestAstFunc1/polydoubleincludewithtype.graph
+++ b/lang/interpret_test/TestAstFunc1/polydoubleincludewithtype.graph
@@ -1 +1 @@
-# err: err3: can't unify, invariant illogicality with equals: base kind does not match (2 != 5)
+# err: err3: can't unify, invariant illogicality with equals: base kind does not match (Str != List)
diff --git a/lang/types/Makefile b/lang/types/Makefile
new file mode 100644
index 00000000..ee2da50a
--- /dev/null
+++ b/lang/types/Makefile
@@ -0,0 +1,30 @@
+# Mgmt
+# Copyright (C) 2013-2019+ James Shubin and the project contributors
+# Written by James Shubin <james@shubin.ca> and the project contributors
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+SHELL = /usr/bin/env bash
+.PHONY: all build clean
+
+all: build
+
+build: kind_stringer.go
+
+clean:
+	@rm -f kind_stringer.go || true
+
+kind_stringer.go: type.go
+	@echo "Generating: type kind strings..."
+	go generate
diff --git a/lang/unification_test.go b/lang/unification_test.go
index 77908591..9eb9d60b 100644
--- a/lang/unification_test.go
+++ b/lang/unification_test.go
@@ -697,7 +697,7 @@ func TestUnification1(t *testing.T) {
 			name:      "typed if expr",
 			ast:       stmt,
 			fail:      true,
-			experrstr: "can't unify, invariant illogicality with equality: base kind does not match (2 != 3)",
+			experrstr: "can't unify, invariant illogicality with equality: base kind does not match (Str != Int)",
 		})
 	}
 	{
@@ -750,7 +750,7 @@ func TestUnification1(t *testing.T) {
 			name:      "typed var expr",
 			ast:       stmt,
 			fail:      true,
-			experrstr: "can't unify, invariant illogicality with equality: base kind does not match (2 != 1)",
+			experrstr: "can't unify, invariant illogicality with equality: base kind does not match (Str != Bool)",
 		})
 	}
 
diff --git a/test/test-golint.sh b/test/test-golint.sh
index f3c3855c..11b1566d 100755
--- a/test/test-golint.sh
+++ b/test/test-golint.sh
@@ -27,7 +27,7 @@ if [ "$COMMITS" != "" ] && [ "$COMMITS" -gt "1" ]; then
 fi
 
 # find all go files, exluding temporary directories and generated files
-LINT=$(find * -maxdepth 9 -iname '*.go' -not -path 'old/*' -not -path 'tmp/*' -not -path 'bindata/*' -not -path 'lang/y.go' -not -path 'lang/lexer.nn.go' -not -path 'vendor/*' -exec golint {} \;)	# current golint output
+LINT=$(find * -maxdepth 9 -iname '*.go' -not -path 'old/*' -not -path 'tmp/*' -not -path 'bindata/*' -not -path 'lang/y.go' -not -path 'lang/lexer.nn.go' -not -path 'lang/types/kind_stringer.go' -not -path 'vendor/*' -exec golint {} \;)	# current golint output
 
 COUNT=`echo -e "$LINT" | wc -l`	# number of golint problems in current branch
 [ "$LINT" = "" ] && echo PASS && exit	# everything is "perfect"
diff --git a/test/test-gometalinter.sh b/test/test-gometalinter.sh
index 535f3d4f..9dea1ba6 100755
--- a/test/test-gometalinter.sh
+++ b/test/test-gometalinter.sh
@@ -48,6 +48,7 @@ gml="$gml --enable=misspell"
 gml="$gml --exclude=lang/lexer.nn.go"
 gml="$gml --exclude=lang/y.go"
 gml="$gml --exclude=bindata/bindata.go"
+gml="$gml --exclude=lang/types/kind_stringer.go"
 
 gometalinter="$gml"	# final
 echo "Using: $gometalinter"