diff --git a/IV/Makefile b/IV/Makefile
index 43cd7b3..dfd5df5 100644
--- a/IV/Makefile
+++ b/IV/Makefile
@@ -41,8 +41,8 @@ mj-msc-full.pdf: mj-msc.pdf version.inc.tex $(ARCHIVABLES) ## Thesis for publish
 .PHONY: test
 test: .faux_test ## Unit tests (fast)
 
-.PHONY: test-integration
-test-integration: .faux_test-integration ## Integration tests (slow)
+.PHONY: test-rivers
+test-rivers: .faux_test-rivers ## Rivers tests (slow)
 
 .PHONY: slides
 slides: $(SLIDES)
@@ -113,7 +113,7 @@ selfcrossing-1-after_2SELECT = wm_debug where name='selfcrossing-1' AND stage='b
 selfcrossing-1-after_2LINESTYLE = invisible
 
 
-.faux_test-integration: tests-integration.sql wm.sql .faux_db
+.faux_test-rivers: tests-rivers.sql wm.sql .faux_db
 	./db -f $<
 	touch $@
 
@@ -161,7 +161,7 @@ mj-msc-gray.pdf: mj-msc.pdf
 .PHONY: clean
 clean: ## Clean the current working directory
 	-./db stop
-	-rm -r .faux_test .faux_aggregate-rivers .faux_test-integration .faux_db \
+	-rm -r .faux_test .faux_aggregate-rivers .faux_test-rivers .faux_db \
 		version.inc.tex vars.inc.tex version.aux version.fdb_latexmk \
 		_minted-mj-msc \
 		$(shell git ls-files -o mj-msc*) \
@@ -169,7 +169,7 @@ clean: ## Clean the current working directory
 		$(SLIDES)
 
 .PHONY: clean-tables
-clean-tables: ## Remove tables created during unit or integration tests
+clean-tables: ## Remove tables created during unit or rivers tests
 	./db -c '\dt wm_*' | awk '/_/{print "drop table "$$3";"}' | ./db -f -
 	-rm .faux_db
 
diff --git a/IV/init.sql b/IV/init.sql
index 4370f80..61e4c24 100644
--- a/IV/init.sql
+++ b/IV/init.sql
@@ -1,4 +1,4 @@
--- This file initializes tables for unit and integration tests.
+-- This file initializes tables for unit and river tests.
 -- ST_SimplifyWM, when dbgname is non-empty, expects `wm_debug` table to be
 -- created.
 
diff --git a/IV/tests-integration.sql b/IV/tests-rivers.sql
similarity index 58%
rename from IV/tests-integration.sql
rename to IV/tests-rivers.sql
index 28d3dd9..606e517 100644
--- a/IV/tests-integration.sql
+++ b/IV/tests-rivers.sql
@@ -1,5 +1,19 @@
 \i wm.sql
 
+insert into wm_visuals(name, way) values('salcia-visincia',
+  st_closestpoint(
+    (select way from wm_rivers where name='Šalčia'),
+    (select way from wm_rivers where name='Visinčia')
+  )
+);
+
+insert into wm_visuals(name, way) values('nemunas-merkys',
+  st_closestpoint(
+    (select way from wm_rivers where name='Nemunas'),
+    (select way from wm_rivers where name='Merkys')
+  )
+);
+
 do $$
 declare
   npoints bigint;