diff --git a/dlls/msi/tests/install.c b/dlls/msi/tests/install.c
index 6ed3a4bbf1b..33f34b3f845 100644
--- a/dlls/msi/tests/install.c
+++ b/dlls/msi/tests/install.c
@@ -316,7 +316,7 @@ static int fci_delete(char *pszFile, int *err, void *pv)
     return 0;
 }
 
-static BOOL check_record(MSIHANDLE rec, UINT field, LPSTR val)
+static BOOL check_record(MSIHANDLE rec, UINT field, LPCSTR val)
 {
     CHAR buffer[0x20];
     UINT r;
@@ -403,6 +403,8 @@ static void create_cab_file(const CHAR *name)
     CCAB cabParams;
     HFCI hfci;
     ERF erf;
+    static CHAR four_txt[] = "four.txt",
+                five_txt[] = "five.txt";
     BOOL res;
 
     set_cab_parameters(&cabParams, name);
@@ -413,8 +415,8 @@ static void create_cab_file(const CHAR *name)
 
     ok(hfci != NULL, "Failed to create an FCI context\n");
 
-    add_file(hfci, "four.txt");
-    add_file(hfci, "five.txt");
+    add_file(hfci, four_txt);
+    add_file(hfci, five_txt);
 
     res = FCIFlushCabinet(hfci, FALSE, get_next_cabinet, progress);
     ok(res, "Failed to flush the cabinet\n");
diff --git a/dlls/msi/tests/package.c b/dlls/msi/tests/package.c
index 55b2e1c6d30..29b9d3f2c76 100644
--- a/dlls/msi/tests/package.c
+++ b/dlls/msi/tests/package.c
@@ -1765,6 +1765,7 @@ static void test_getproperty(void)
 {
     MSIHANDLE hPackage = 0;
     char prop[100];
+    static CHAR empty[] = "";
     DWORD size;
     UINT r;
 
@@ -1783,7 +1784,7 @@ static void test_getproperty(void)
 
     /* retrieve the size, empty string */
     size = 0;
-    r = MsiGetProperty(hPackage, "Name", "", &size);
+    r = MsiGetProperty(hPackage, "Name", empty, &size);
     ok( r == ERROR_MORE_DATA, "Expected ERROR_MORE_DATA, got %d\n", r);
     ok( size == 5, "Expected 5, got %ld\n", size);