diff --git a/.travis.yml b/.travis.yml
index 3751d20..f74dec4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,3 +4,4 @@ install:
 
 script:
   - crystal spec
+  - bin/crytic --preamble ""
diff --git a/Makefile b/Makefile
index 53ff128..909421d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-PHONY: app-container clean check test
+PHONY: app-container clean check test deps crytic
 
 CR_FLAGS="--release --static --no-debug -Dtrace"
 PUBLIC_PORT=9000
@@ -12,5 +12,11 @@ clean:
 check:
 	crystal build --no-codegen src/**/*.cr
 
-test:
-	crystal spec
+deps:
+	shards install
+
+test: deps
+	crystal spec -- -p 3
+
+crytic: deps
+	bin/crytic --preamble ""
diff --git a/spec/gopher/resolver_spec.cr b/spec/gopher/resolver_spec.cr
new file mode 100644
index 0000000..09b3b37
--- /dev/null
+++ b/spec/gopher/resolver_spec.cr
@@ -0,0 +1,24 @@
+require "../spec_helper"
+
+class SpecResolver < Gopher::Resolver
+  def resolve(_req)
+    Gopher::Response.error("BOOM")
+  end
+
+  def menu_entry_type
+    Gopher::MenuEntryType::Error
+  end
+end
+
+module Gopher
+  describe Resolver do
+    describe "default values" do
+      it "are correct" do
+        resolver = SpecResolver.new
+
+        expect(resolver.default_host).must_equal("localhost")
+        expect(resolver.default_port).must_equal(70_u16)
+      end
+    end
+  end
+end
diff --git a/spec/gopher/resolvers/directory_resolver_spec.cr b/spec/gopher/resolvers/directory_resolver_spec.cr
index f83cee7..f373203 100644
--- a/spec/gopher/resolvers/directory_resolver_spec.cr
+++ b/spec/gopher/resolvers/directory_resolver_spec.cr
@@ -30,16 +30,18 @@ module Gopher
         expect(menu.entries.size > 0).must_equal(true)
       end
 
-      it "lists .txt files as text entries" do
-        result = dr.resolve(req)
-        menu = result.value.as Menu
+      it "lists text files as text entries" do
+        DirectoryResolver::TEXT_EXTENSIONS.each do |ext|
+          result = dr.resolve(req)
+          menu = result.value.as Menu
 
-        ipsum = menu.entries.count do |entry|
-          entry.entry_type == MenuEntryType::TextFile &&
-            entry.selector == "/1files/0ipsum.txt"
-        end
+          ipsum = menu.entries.count do |entry|
+            entry.entry_type == MenuEntryType::TextFile &&
+              entry.selector == "/1files/0test#{ext}"
+          end
 
-        expect(ipsum).must_equal(1)
+          expect(ipsum).must_equal(1)
+        end
       end
 
       it "includes submenus" do
diff --git a/spec/resources/example_directory/.gophermap b/spec/resources/example_directory/.gophermap
index d0fea51..ea6cc7a 100644
--- a/spec/resources/example_directory/.gophermap
+++ b/spec/resources/example_directory/.gophermap
@@ -3,3 +3,23 @@ i
 0Hipster Ipsum	0ipsum.txt	%HOST%	%PORT%
 1Games	/1games	%HOST%	%PORT%
 1Other Directory	/1looks_like_a_file_but_is_a.directory	%HOST%	%PORT%
+i Test text files:
+0c	0test.c	%HOST%	%PORT%
+0C	0test.C	%HOST%	%PORT%
+0cpp	0test.cpp	%HOST%	%PORT%
+0cs	0test.cs	%HOST%	%PORT%
+0cr	0test.cr	%HOST%	%PORT%
+0d	0test.d	%HOST%	%PORT%
+0el	0test.el	%HOST%	%PORT%
+0fs	0test.fs	%HOST%	%PORT%
+0html	0test.html	%HOST%	%PORT%
+0xml	0test.xml	%HOST%	%PORT%
+0json	0test.json	%HOST%	%PORT%
+0txt	0test.txt	%HOST%	%PORT%
+0md	0test.md	%HOST%	%PORT%
+0markdown	0test.markdown	%HOST%	%PORT%
+0rb	0test.rb	%HOST%	%PORT%
+0py	0test.py	%HOST%	%PORT%
+0sh	0test.sh	%HOST%	%PORT%
+0rtf	0test.rtf	%HOST%  %PORT%
+0js	0test.js	%HOST%  %PORT%
diff --git a/spec/resources/example_directory/test.c b/spec/resources/example_directory/test.c
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.cpp b/spec/resources/example_directory/test.cpp
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.cr b/spec/resources/example_directory/test.cr
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.cs b/spec/resources/example_directory/test.cs
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.d b/spec/resources/example_directory/test.d
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.el b/spec/resources/example_directory/test.el
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.fs b/spec/resources/example_directory/test.fs
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.html b/spec/resources/example_directory/test.html
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.js b/spec/resources/example_directory/test.js
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.markdown b/spec/resources/example_directory/test.markdown
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.md b/spec/resources/example_directory/test.md
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.py b/spec/resources/example_directory/test.py
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.rb b/spec/resources/example_directory/test.rb
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.rtf b/spec/resources/example_directory/test.rtf
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.sh b/spec/resources/example_directory/test.sh
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.txt b/spec/resources/example_directory/test.txt
new file mode 100644
index 0000000..e69de29
diff --git a/spec/resources/example_directory/test.xml b/spec/resources/example_directory/test.xml
new file mode 100644
index 0000000..e69de29
diff --git a/src/gopher/resolvers/directory_resolver.cr b/src/gopher/resolvers/directory_resolver.cr
index 7846d07..01bec13 100644
--- a/src/gopher/resolvers/directory_resolver.cr
+++ b/src/gopher/resolvers/directory_resolver.cr
@@ -8,7 +8,7 @@ module Gopher
     PORT_MARKER       = "%PORT%"
     IMAGE_EXTENSIONS  = [".jpg", ".gif", ".bmp", ".png", ".jpeg", ".tif", ".tiff", ".tga", ".ico"]
     BINARY_EXTENSIONS = IMAGE_EXTENSIONS + [".zip", ".tar", ".gz", ".bz2", ".doc", ".xls", ".ppt", ".exe", ".wav", ".mp3", ".ogg"]
-    TEXT_EXTENSIONS   = [".c", ".C", ".cpp", ".cs", ".cr", ".d", ".el", ".fs", ".html", ".xml", ".json", ".txt", ".md", ".markdown", ".rb", ".py", ".sh", ".js", ".rtf"]
+    TEXT_EXTENSIONS   = [".c", ".cpp", ".cs", ".cr", ".d", ".el", ".fs", ".html", ".xml", ".json", ".txt", ".md", ".markdown", ".rb", ".py", ".sh", ".js", ".rtf"]
 
     def initialize(@root_path : String, @root_selector : String, config)
       super(config)