diff --git a/map.cpp b/map.cpp
index c1295bb..0bb06c6 100644
--- a/map.cpp
+++ b/map.cpp
@@ -5,30 +5,11 @@
 #include <array>
 #include <fmt/core.h>
 #include <utility>
+#include "matrix.hpp"
 
 using std::vector, std::pair;
 using namespace fmt;
 
-void dump_map(const std::string &msg, Matrix &map, int show_x, int show_y) {
-  println("----------------- {}", msg);
-  for(size_t y = 0; y < map.size(); y++) {
-    for(size_t x = 0; x < map[y].size(); x++) {
-      int col = map[y][x];
-
-      if(int(x) == show_x && int(y) == show_y) {
-        print("{:x}<", col);
-      } else if(col == WALL_PATH_LIMIT) {
-        print("# ");
-      } else if(col > 15) {
-        print("* ");
-      } else {
-        print("{:x} ", col);
-      }
-    }
-    print("\n");
-  }
-}
-
 Map::Map(size_t width, size_t height) :
   $width(width),
   $height(height),
@@ -73,8 +54,8 @@ bool Map::iswall(size_t x, size_t y) {
 }
 
 void Map::dump(int show_x, int show_y) {
-  dump_map("WALLS", walls(), show_x, show_y);
-  dump_map("PATHS", paths(), show_x, show_y);
+  matrix_dump("WALLS", walls(), show_x, show_y);
+  matrix_dump("PATHS", paths(), show_x, show_y);
 }
 
 bool Map::can_move(Point move_to) {
diff --git a/map.hpp b/map.hpp
index 6e5b158..9c834a5 100644
--- a/map.hpp
+++ b/map.hpp
@@ -26,8 +26,6 @@ struct Room {
   DEFINE_SERIALIZABLE(Room, x, y, width, height);
 };
 
-void dump_map(const std::string &msg, Matrix &map, int show_x=-1, int show_y=-1);
-
 class Map {
 public:
   size_t $width;
diff --git a/matrix.cpp b/matrix.cpp
new file mode 100644
index 0000000..3c45046
--- /dev/null
+++ b/matrix.cpp
@@ -0,0 +1,25 @@
+#include "matrix.hpp"
+#include "constants.hpp"
+#include <fmt/core.h>
+
+using namespace fmt;
+
+void matrix_dump(const std::string &msg, Matrix &map, int show_x, int show_y) {
+  println("----------------- {}", msg);
+  for(size_t y = 0; y < map.size(); y++) {
+    for(size_t x = 0; x < map[y].size(); x++) {
+      int col = map[y][x];
+
+      if(int(x) == show_x && int(y) == show_y) {
+        print("{:x}<", col);
+      } else if(col == WALL_PATH_LIMIT) {
+        print("# ");
+      } else if(col > 15) {
+        print("* ");
+      } else {
+        print("{:x} ", col);
+      }
+    }
+    print("\n");
+  }
+}
diff --git a/matrix.hpp b/matrix.hpp
index b34270f..df39410 100644
--- a/matrix.hpp
+++ b/matrix.hpp
@@ -1,5 +1,6 @@
 #pragma once
 #include <vector>
+#include <string>
 
 typedef std::vector<int> MatrixRow;
 typedef std::vector<MatrixRow> Matrix;
@@ -12,3 +13,5 @@ inline void matrix_assign(Matrix &out, int new_value) {
     row.assign(row.size(), new_value);
   }
 }
+
+void matrix_dump(const std::string &msg, Matrix &map, int show_x=-1, int show_y=-1);
diff --git a/meson.build b/meson.build
index 0e047df..1bcd3fe 100644
--- a/meson.build
+++ b/meson.build
@@ -19,6 +19,7 @@ dependencies = [
 ]
 
 runtests = executable('runtests', [
+  'matrix.cpp',
   'dbc.cpp',
   'map.cpp',
   'rand.cpp',
@@ -55,6 +56,7 @@ runtests = executable('runtests', [
   dependencies: dependencies)
 
 roguish = executable('roguish', [
+  'matrix.cpp',
   'dbc.cpp',
   'main.cpp',
   'map.cpp',
diff --git a/tests/dijkstra.json b/tests/dijkstra.json
index 3cdd8d6..cafb3c2 100644
--- a/tests/dijkstra.json
+++ b/tests/dijkstra.json
@@ -14,8 +14,8 @@
   "expected": [
     [1, 1, 1, 0],
      [1, 0, 1, 1],
-     [1, 0, 10, 2],
-     [1, 1, 10, 3]
+     [1, 0, 1000, 2],
+     [1, 1, 1000, 3]
   ]
 },{
   "input": [
@@ -33,7 +33,7 @@
   "expected": [
     [1, 1, 1, 0],
      [1, 0, 1, 1],
-     [1, 0, 16, 2],
-     [1, 1, 16, 3]
+     [1, 0, 1000, 2],
+     [1, 1, 1000, 3]
   ]
 }]
diff --git a/tests/map.cpp b/tests/map.cpp
index 9ea1fcb..68cf2fd 100644
--- a/tests/map.cpp
+++ b/tests/map.cpp
@@ -48,8 +48,8 @@ TEST_CASE("dijkstra algo test", "[map]") {
 
     if(paths != expected) {
       println("ERROR! ------");
-      dump_map("EXPECTED", expected);
-      dump_map("RESULT", paths);
+      matrix_dump("EXPECTED", expected);
+      matrix_dump("RESULT", paths);
     }
 
     REQUIRE(map.INVARIANT());
diff --git a/tests/pathing.cpp b/tests/pathing.cpp
index 8ab2ae2..c4df3a4 100644
--- a/tests/pathing.cpp
+++ b/tests/pathing.cpp
@@ -3,7 +3,7 @@
 #include <nlohmann/json.hpp>
 #include <fstream>
 #include "pathing.hpp"
-#include "map.hpp"
+#include "matrix.hpp"
 
 using namespace fmt;
 using namespace nlohmann;
@@ -30,6 +30,8 @@ TEST_CASE("dijkstra algo test", "[pathing]") {
 
     REQUIRE(pathing.INVARIANT());
 
-    // REQUIRE(pathing.$paths == expected);
+    matrix_dump("PATHING RESULT", pathing.$paths);
+    matrix_dump("PATHING EXPECTED", expected);
+    REQUIRE(pathing.$paths == expected);
   }
 }
diff --git a/tests/worldbuilder.cpp b/tests/worldbuilder.cpp
index 218d133..052c6ed 100644
--- a/tests/worldbuilder.cpp
+++ b/tests/worldbuilder.cpp
@@ -20,7 +20,7 @@ TEST_CASE("dumping and debugging", "[builder]") {
   WorldBuilder builder(map);
   builder.generate();
 
-  dump_map("GENERATED", map.paths());
+  matrix_dump("GENERATED", map.paths());
   map.dump();
 }