diff --git a/Cargo.lock b/Cargo.lock
index a615610..b514895 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -377,6 +377,11 @@ dependencies = [
  "migrations_macros 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "difference"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "dissolve"
 version = "0.2.2"
@@ -668,6 +673,7 @@ dependencies = [
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "native-tls 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pretty_assertions 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rfc822_sanitizer 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -690,6 +696,7 @@ dependencies = [
  "hyper 0.11.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "mime_guess 1.8.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pretty_assertions 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "reqwest 0.8.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempdir 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -716,6 +723,7 @@ dependencies = [
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "loggerv 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "open 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pretty_assertions 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "reqwest 0.8.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1262,6 +1270,15 @@ name = "precomputed-hash"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "pretty_assertions"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "difference 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "0.2.3"
@@ -2090,6 +2107,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum diesel 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "925325c57038f2f14c0413bdf6a92ca72acff644959d0a1a9ebf8d19be7e9c01"
 "checksum diesel_derives 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "28e2b2605ac6a3b9a586383f5f8b2b5f1108f07a421ade965b266289d2805e79"
 "checksum diesel_migrations 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0928a7d6f27c849954185416bd59439837de55fbc89e2985b0e46e756ae4e3da"
+"checksum difference 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "524cbf6897b527295dff137cec09ecf3a05f4fddffd7dfcd1585403449e74198"
 "checksum dissolve 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "898542be4716d992082c8e4fc331b792d626cfa71cb2b4790f828b9a8f921a90"
 "checksum dtoa 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "09c3753c3db574d215cba4ea76018483895d7bff25a31b49ba45db21c48e50ab"
 "checksum either 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3be565ca5c557d7f59e7cfcf1844f9e3033650c929c6566f511e8005f205c1d0"
@@ -2177,6 +2195,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum phf_shared 0.7.21 (registry+https://github.com/rust-lang/crates.io-index)" = "07e24b0ca9643bdecd0632f2b3da6b1b89bbb0030e0b992afc1113b23a7bc2f2"
 "checksum pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "3a8b4c6b8165cd1a1cd4b9b120978131389f64bdaf456435caa41e630edba903"
 "checksum precomputed-hash 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"
+"checksum pretty_assertions 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "3a029430f0d744bc3d15dd474d591bed2402b645d024583082b9f63bb936dac6"
 "checksum proc-macro2 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "cd07deb3c6d1d9ff827999c7f9b04cdfd66b1b17ae508e14fe47b620f2282ae0"
 "checksum quick-error 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "eda5fe9b71976e62bc81b781206aaa076401769b2143379d3eb2118388babac4"
 "checksum quick-xml 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b14c27e04216596a49f2b82398a24f67ed9f131a5c0e0235496ea446bdacfb12"
diff --git a/hammond-data/Cargo.toml b/hammond-data/Cargo.toml
index 6e7d655..73b91ec 100644
--- a/hammond-data/Cargo.toml
+++ b/hammond-data/Cargo.toml
@@ -38,6 +38,7 @@ version = "1.1.0"
 rand = "0.4.2"
 tempdir = "0.3.7"
 criterion = "0.2.2"
+pretty_assertions = "0.5.1"
 
 [[bench]]
 name = "bench"
diff --git a/hammond-data/src/lib.rs b/hammond-data/src/lib.rs
index 095564d..d49d047 100644
--- a/hammond-data/src/lib.rs
+++ b/hammond-data/src/lib.rs
@@ -20,6 +20,10 @@
 
 //! FIXME: Docs
 
+#[cfg(test)]
+#[macro_use]
+extern crate pretty_assertions;
+
 #[macro_use]
 extern crate derive_builder;
 #[macro_use]
diff --git a/hammond-downloader/Cargo.toml b/hammond-downloader/Cargo.toml
index b02e723..d1cb267 100644
--- a/hammond-downloader/Cargo.toml
+++ b/hammond-downloader/Cargo.toml
@@ -18,3 +18,5 @@ failure_derive = "0.1.1"
 [dependencies.hammond-data]
 path = "../hammond-data"
 
+[dev-dependencies]
+pretty_assertions = "0.5.1"
\ No newline at end of file
diff --git a/hammond-downloader/src/lib.rs b/hammond-downloader/src/lib.rs
index 37b2c40..e48d8a6 100644
--- a/hammond-downloader/src/lib.rs
+++ b/hammond-downloader/src/lib.rs
@@ -9,6 +9,10 @@ extern crate failure_derive;
 #[macro_use]
 extern crate log;
 
+#[cfg(test)]
+#[macro_use]
+extern crate pretty_assertions;
+
 extern crate glob;
 extern crate hammond_data;
 extern crate hyper;
diff --git a/hammond-gtk/Cargo.toml b/hammond-gtk/Cargo.toml
index d5c9d94..7c9d0a8 100644
--- a/hammond-gtk/Cargo.toml
+++ b/hammond-gtk/Cargo.toml
@@ -41,3 +41,6 @@ path = "../hammond-data"
 
 [dependencies.hammond-downloader]
 path = "../hammond-downloader"
+
+[dev-dependencies]
+pretty_assertions = "0.5.1"
\ No newline at end of file
diff --git a/hammond-gtk/src/main.rs b/hammond-gtk/src/main.rs
index 10d3af4..eac14c7 100644
--- a/hammond-gtk/src/main.rs
+++ b/hammond-gtk/src/main.rs
@@ -19,6 +19,10 @@ extern crate lazy_static;
 #[macro_use]
 extern crate log;
 
+#[cfg(test)]
+#[macro_use]
+extern crate pretty_assertions;
+
 extern crate ammonia;
 extern crate chrono;
 // extern crate dissolve;