diff --git a/app/src/test/java/android/emu6502/AssemblerTest.java b/app/src/test/java/android/emu6502/AssemblerTest.java
index 0acee5f..05eba1d 100644
--- a/app/src/test/java/android/emu6502/AssemblerTest.java
+++ b/app/src/test/java/android/emu6502/AssemblerTest.java
@@ -1,9 +1,9 @@
 package android.emu6502;
 
-import com.google.common.collect.ImmutableList;
-
 import android.emu6502.instructions.Symbols;
 
+import com.google.common.collect.ImmutableList;
+
 import org.junit.Before;
 import org.junit.Test;
 
@@ -127,4 +127,14 @@ public class AssemblerTest {
     assembler.assembleCode(lines);
     assertThat(assembler.hexdump(), equalTo("0600: A9 03 4C 08 06 00 00 00 8D 00 02"));
   }
+
+  @Test public void testSymbols() {
+    List<String> lines = ImmutableList.of(
+        "define  sysRandom  $fe ; an adress",
+        "define  a_dozen    $0c ; a constant",
+        "LDA sysRandom  ; equivalent to \"LDA $fe\"",
+        "LDX #a_dozen   ; equivalent to \"LDX #$0c\"");
+    assembler.assembleCode(lines);
+    assertThat(assembler.hexdump(), equalTo("0600: A5 FE A2 0C"));
+  }
 }
diff --git a/app/src/test/java/android/emu6502/CPUTest.java b/app/src/test/java/android/emu6502/CPUTest.java
index a1fb5e0..3d1d992 100644
--- a/app/src/test/java/android/emu6502/CPUTest.java
+++ b/app/src/test/java/android/emu6502/CPUTest.java
@@ -126,4 +126,18 @@ public class CPUTest {
     assertThat(cpu.getPC(), equalTo(0x0613));
     assertThat(cpu.flags(), equalTo("00110011"));
   }
+
+  @Test public void testSymbols() {
+    List<String> lines = ImmutableList.of(
+        "define a_dozen $0c ; a constant",
+        "LDX #a_dozen       ; equivalent to \"LDX #$0c\"");
+    assembler.assembleCode(lines);
+    cpu.execute();
+    assertThat(cpu.getA(), equalTo(0x00));
+    assertThat(cpu.getX(), equalTo(0x0C));
+    assertThat(cpu.getY(), equalTo(0x00));
+    assertThat(cpu.getSP(), equalTo(0xFF));
+    assertThat(cpu.getPC(), equalTo(0x0603));
+    assertThat(cpu.flags(), equalTo("00110000"));
+  }
 }