diff --git a/mozglue/linker/moz.build b/mozglue/linker/moz.build
index 4dc6ac0dd1d5..5204347c3bd1 100644
--- a/mozglue/linker/moz.build
+++ b/mozglue/linker/moz.build
@@ -21,17 +21,7 @@ DEFINES['IMPL_MFBT'] = True
 
 DisableStlWrapping()
 
-# Avoid building the linker tests if building with icecc since it doesn't deal
-# well with .incbin.
-#
-# A better solution would be to set ICECC=no in the environment before building
-# these objects to force the local build, but moz.build lacks such a capability
-# at the moment.
-#
-# TODO: Remove this when https://github.com/icecc/icecream/pull/463 is merged
-# and in a release.
-if not CONFIG['CXX_IS_ICECREAM']:
-    TEST_DIRS += ['tests']
+TEST_DIRS += ['tests']
 
 if CONFIG['CC_TYPE'] in ('clang', 'gcc'):
     CXXFLAGS += ['-Wno-error=shadow']
diff --git a/mozglue/linker/tests/TestZip.cpp b/mozglue/linker/tests/TestZip.cpp
index ac5372a11365..a2d2b10bdd5d 100644
--- a/mozglue/linker/tests/TestZip.cpp
+++ b/mozglue/linker/tests/TestZip.cpp
@@ -11,37 +11,14 @@
 
 Logging Logging::Singleton;
 
-/**
- * ZIP_DATA(FOO, "foo") defines the variables FOO and FOO_SIZE.
- * The former contains the content of the "foo" file in the same directory
- * as this file, and FOO_SIZE its size.
- */
-/* clang-format off */
-#define ZIP_DATA(name, file)                          \
-  __asm__(".global " #name "\n"                       \
-          ".data\n"                                   \
-          ".balign 16\n"                              \
-          #name ":\n"                                 \
-          "  .incbin \"" SRCDIR "/" file "\"\n"       \
-          ".L" #name "_END:\n"                        \
-          "  .size " #name ", .L" #name "_END-" #name \
-          "\n"                                        \
-          ".global " #name "_SIZE\n"                  \
-          ".data\n"                                   \
-          ".balign 4\n"                               \
-          #name "_SIZE:\n"                            \
-          "  .int .L" #name "_END-" #name "\n");      \
-  extern const unsigned char name[];                  \
-  extern const unsigned int name##_SIZE
-/* clang-format on */
-
 /**
  * test.zip is a basic test zip file with a central directory. It contains
  * four entries, in the following order:
  * "foo", "bar", "baz", "qux".
  * The entries are going to be read out of order.
  */
-ZIP_DATA(TEST_ZIP, "test.zip");
+extern const unsigned char TEST_ZIP[];
+extern const unsigned int TEST_ZIP_SIZE;
 const char* test_entries[] = {"baz", "foo", "bar", "qux"};
 
 /**
@@ -58,7 +35,8 @@ const char* test_entries[] = {"baz", "foo", "bar", "qux"};
  *   zipalign if it had a data descriptor originally.
  * - Fourth entry is a file "d", STOREd.
  */
-ZIP_DATA(NO_CENTRAL_DIR_ZIP, "no_central_dir.zip");
+extern const unsigned char NO_CENTRAL_DIR_ZIP[];
+extern const unsigned int NO_CENTRAL_DIR_ZIP_SIZE;
 const char* no_central_dir_entries[] = {"a", "b", "c", "d"};
 
 TEST(Zip, TestZip)
diff --git a/mozglue/linker/tests/TestZipData.S b/mozglue/linker/tests/TestZipData.S
new file mode 100644
index 000000000000..5fbb82545197
--- /dev/null
+++ b/mozglue/linker/tests/TestZipData.S
@@ -0,0 +1,17 @@
+.macro zip_data name, path
+  .global \name
+  .data
+  .balign 16
+  \name:
+  .incbin "\path"
+  .L\name\()_END:
+  .size \name, .L\name\()_END-\name
+  .global \name\()_SIZE
+  .data
+  .balign 4
+  \name\()_SIZE:
+  .int .L\name\()_END-\name
+.endm
+
+zip_data TEST_ZIP, "test.zip"
+zip_data NO_CENTRAL_DIR_ZIP, "no_central_dir.zip"
diff --git a/mozglue/linker/tests/moz.build b/mozglue/linker/tests/moz.build
index 29b0e6e428ce..f2470dbbbeb0 100644
--- a/mozglue/linker/tests/moz.build
+++ b/mozglue/linker/tests/moz.build
@@ -11,9 +11,13 @@ UNIFIED_SOURCES += [
     'TestZip.cpp',
 ]
 
+SOURCES += [
+    'TestZipData.S',
+]
+
 LOCAL_INCLUDES += ['..']
 
 if CONFIG['CC_TYPE'] in ('clang', 'gcc'):
     CXXFLAGS += ['-Wno-error=shadow']
 
-DEFINES['SRCDIR'] = '"%s"' % SRCDIR
+ASFLAGS += ['-I', SRCDIR]