diff --git a/tests/UI_double_spinbox.cpp b/tests/UI_double_spinbox.cpp
new file mode 100644
index 0000000..6ec223e
--- /dev/null
+++ b/tests/UI_double_spinbox.cpp
@@ -0,0 +1,22 @@
+#include "Test.hpp"
+
+TEST(UI_double_spinbox, to_from_json)
+{
+    UI_double_spinbox spinbox(0, 10, 5);
+    json j = spinbox.to_json(0);
+    UI_double_spinbox spinbox2;
+    spinbox2.from_json(j);
+    EXPECT_EQ(spinbox.value(), spinbox2.value());
+    EXPECT_EQ(spinbox.min(), spinbox2.min());
+    EXPECT_EQ(spinbox.max(), spinbox2.max());
+}
+
+TEST(UI_double_spinbox, signal)
+{
+    UI_double_spinbox spinbox(0, 10, 5);
+    QSignalSpy spy_ui(&spinbox, &UI_double_spinbox::ui_changed);
+    QSignalSpy spy_val(&spinbox, &UI_double_spinbox::changed);
+    spinbox.set_value(2);
+    EXPECT_EQ(spy_ui.count(), 1);
+    EXPECT_EQ(spy_val.count(), 1);
+}
diff --git a/tests/UI_hex_spinbox.cpp b/tests/UI_hex_spinbox.cpp
new file mode 100644
index 0000000..6f3e772
--- /dev/null
+++ b/tests/UI_hex_spinbox.cpp
@@ -0,0 +1,22 @@
+#include "Test.hpp"
+
+TEST(UI_hex_spinbox, to_from_json)
+{
+    UI_hex_spinbox spinbox(0, 10, 5);
+    json j = spinbox.to_json(0);
+    UI_hex_spinbox spinbox2;
+    spinbox2.from_json(j);
+    EXPECT_EQ(spinbox.value(), spinbox2.value());
+    EXPECT_EQ(spinbox.min(), spinbox2.min());
+    EXPECT_EQ(spinbox.max(), spinbox2.max());
+}
+
+TEST(UI_hex_spinbox, signal)
+{
+    UI_hex_spinbox spinbox(0, 10, 5);
+    QSignalSpy spy_ui(&spinbox, &UI_hex_spinbox::ui_changed);
+    QSignalSpy spy_val(&spinbox, &UI_hex_spinbox::changed);
+    spinbox.set_value(2);
+    EXPECT_EQ(spy_ui.count(), 1);
+    EXPECT_EQ(spy_val.count(), 1);
+}
diff --git a/tests/UI_spinbox.cpp b/tests/UI_spinbox.cpp
new file mode 100644
index 0000000..61e64e3
--- /dev/null
+++ b/tests/UI_spinbox.cpp
@@ -0,0 +1,22 @@
+#include "Test.hpp"
+
+TEST(UI_spinbox, to_from_json)
+{
+    UI_spinbox spinbox(0, 10, 5);
+    json j = spinbox.to_json(0);
+    UI_spinbox spinbox2;
+    spinbox2.from_json(j);
+    EXPECT_EQ(spinbox.value(), spinbox2.value());
+    EXPECT_EQ(spinbox.min(), spinbox2.min());
+    EXPECT_EQ(spinbox.max(), spinbox2.max());
+}
+
+TEST(UI_spinbox, signal)
+{
+    UI_spinbox spinbox(0, 10, 5);
+    QSignalSpy spy_ui(&spinbox, &UI_spinbox::ui_changed);
+    QSignalSpy spy_val(&spinbox, &UI_spinbox::changed);
+    spinbox.set_value(2);
+    EXPECT_EQ(spy_ui.count(), 1);
+    EXPECT_EQ(spy_val.count(), 1);
+}