diff --git a/Makefile b/Makefile
index e5018aef..bbcbb511 100644
--- a/Makefile
+++ b/Makefile
@@ -1,21 +1,4 @@
-# Normal settings.
-
-OBJDIR = .obj
-LUA = lua
-CC = gcc
-CXX = g++
-AR = ar
-PKG_CONFIG = pkg-config
-WX_CONFIG = wx-config
-PROTOC = protoc
-CFLAGS = -g
-CXXFLAGS = -std=c++2a \
-	-Wno-deprecated-enum-float-conversion \
-	-Wno-deprecated-enum-enum-conversion
-LDFLAGS =
-PLATFORM = UNIX
-
-# Apply special Windows settings.
+# Special Windows settings.
 
 ifeq ($(OS), Windows_NT)
 	MINGWBIN = /mingw32/bin
@@ -26,7 +9,26 @@ ifeq ($(OS), Windows_NT)
 	PLATFORM = WINDOWS
 endif
 
-all: $(OBJDIR)/build.ninja
+# Normal settings.
+
+OBJDIR ?= .obj
+LUA ?= lua
+CC ?= gcc
+CXX ?= g++
+AR ?= ar
+PKG_CONFIG ?= pkg-config
+WX_CONFIG ?= wx-config
+PROTOC ?= protoc
+CFLAGS ?= -g -Os
+CXXFLAGS ?= -std=c++2a \
+	-Wno-deprecated-enum-float-conversion \
+	-Wno-deprecated-enum-enum-conversion
+LDFLAGS ?=
+PLATFORM ?= UNIX
+TESTS ?= yes
+
+all:: $(OBJDIR)/build.ninja compile_commands.json
+	@ninja -f $< -t compdb > compile_commands.json
 	@ninja -f $<
 
 $(OBJDIR)/build.ninja: Makefile $(shell find . -name '*.lua')
@@ -43,6 +45,7 @@ $(OBJDIR)/build.ninja: Makefile $(shell find . -name '*.lua')
 		PKG_CONFIG="$(PKG_CONFIG)" \
 		PLATFORM="$(PLATFORM)" \
 		PROTOC="$(PROTOC)" \
+		TESTS="$(TESTS)" \
 		WX_CONFIG="$(WX_CONFIG)" \
 		> $@
 
diff --git a/build.lua b/build.lua
index 37aa42fb..b0abf239 100644
--- a/build.lua
+++ b/build.lua
@@ -4,6 +4,7 @@ vars.ldflags = { "-pthread" }
 
 include "build/protobuf.lua"
 include "build/dependency.lua"
+include "build/tests.lua"
 
 dependency {
 	name = "fmt_dep",
@@ -182,3 +183,5 @@ installable {
 	}
 }
 
+include "tests/build.lua"
+
diff --git a/build/tests.lua b/build/tests.lua
new file mode 100644
index 00000000..176319f7
--- /dev/null
+++ b/build/tests.lua
@@ -0,0 +1,18 @@
+definerule("test",
+	{
+		srcs = { type="targets", default={} },
+	},
+	function (e)
+		if vars.TESTS == "yes" then
+			normalrule {
+				name = e.name,
+				ins = e.srcs,
+				outleaves = { "log.txt" },
+				commands = {
+					"%{ins} > %{outs}",
+				}
+			}
+		end
+	end
+)
+
diff --git a/dep/snowhouse/build.lua b/dep/snowhouse/build.lua
new file mode 100644
index 00000000..34e1a561
--- /dev/null
+++ b/dep/snowhouse/build.lua
@@ -0,0 +1,5 @@
+clibrary {
+	name = "snowhouse",
+	dep_cflags = { "-Idep/snowhouse/include" }
+}
+
diff --git a/dep/stb/build.lua b/dep/stb/build.lua
index 77107d22..dde271b0 100644
--- a/dep/stb/build.lua
+++ b/dep/stb/build.lua
@@ -1,6 +1,6 @@
 clibrary {
 	name = "stb",
 	srcs = { "./stb_image_write.c" },
-	hdrs = { "./stb_image_write.h" }
+	hdrs = { "./stb_image_write.h" },
 }
 
diff --git a/tests/build.lua b/tests/build.lua
new file mode 100644
index 00000000..a0211ccc
--- /dev/null
+++ b/tests/build.lua
@@ -0,0 +1,35 @@
+TESTS = {
+	["agg"] = { "dep/agg+agg", "dep/stb+stb", "~+zlib_dep" },
+	["amiga"] = {},
+	["bitaccumulator"] = {},
+	["bytes"] = {},
+	["compression"] = {},
+	["csvreader"] = {},
+	["flags"] = {},
+	["fluxmapreader"] = {},
+	["fluxpattern"] = {},
+	["fmmfm"] = {},
+	["greaseweazle"] = {},
+	["kryoflux"] = {},
+	["ldbs"] = {},
+	--["proto"] = {},
+	["utils"] = {},
+}
+
+for name, deps in pairs(TESTS) do
+	cprogram {
+		name = name.."_bin",
+		srcs = { "./"..name..".cc" },
+		deps = {
+			"~+libfluxengine",
+			"dep/snowhouse+snowhouse",
+			deps
+		},
+	}
+
+	test {
+		name = name.."_test",
+		srcs = { "+"..name.."_bin" }
+	}
+end
+